It's not across the board by any means, but there are most definitely areas that are suffering.
Don't really know much about stamp collecting, but I would imagine that it's one of those things that are "nice to have", rather than "need to have" and as such, suffering with sales.

Have you tried selling on other sites etc?  
I would imagine that there are specialist type sites for that kind of thing, which would be place to go to.

Maybe it's worth reviewing what you are actually selling and expanding range etc?

Ebay will usually make sure you make just enough to keep you barely interested in staying.

As a fellow stamp seller I can say fees and costs are up, prices are down and sales are coming into what I call ‘slump’ season. Overall, I would say more down than usual but I put much of that down to the current economic climate.  Im still getting a lot of overseas sales.

I send out 2nd class and have a 3 day handling time which I find has very little detrimental impact. Many stamp collectors are a bit (read a lot!) tight with their money and will often try to get stamps at the lowest price possible. In fact I have a rather nice example currently on sale at half price and I have a regular haggler trying to get me ridiculously down on it. First offer I straight declined because it was insulting, second Im currently ignoring as Im not prepared to go lower than the sale price which is a giveaway anyway. 

I would recommend using SG numbers at all times unless you don’t know them. People collect themes, letters, cancels, perfins, misperfs, highlight these wherever possible.

Times are hard and competition is rising.

Amazon, Ali Express, Ali Baba etc etc

The Chinese sellers sell stuff for peanuts.

Our sales dropped as well and what is changed is the daily views its very low the last 2 weeks. 😞

All dall get about 200-300 views instead before 500-600, as I nothing changed my shop. Put every day new active items but something happened with Impressions and views. I have all my listing active coupons and all promoted but still this no help my shop. Yesterday just talked with costumer service as last week and all the time same things your shop is very clear and not see any problem and just wait will get sales soon. 

15+ years selling full time on ebay with mostly niche items and have never known it so bad.

Viewings are really down and the  watchers list has dropped significantly. It's really flat lined the past few months.

Something has changed with the ebay algorithms (Ai possibly playing a part).

Also this 'promoted listings' thing is having an effect. And of course the economic climate ((

Oh.... and Brexit.

Why are so few sellers unwilling to acknowledge the effect that the current "cost of living crisis" is having on sales, particularly on sales of non-essential items?

I'm sure these sellers are tightening their own belts, so why can't they see that others will be, too?

While promoting and advertising will obviously have a positive effect on sales volumes (as they should), I now see that "the algorithm" is now the catch-all excuse, trotted out by those unwilling to accept reality and adapt accordingly.

If the total amount being spent is reducing, as it seems to be, then individuals' share of that pot will also decrease, especially when selling non-essentials.

It's not rocket surgery!

I am just a private seller, but for sure slowly over the past couple of years views & sales have slowly been getting terrible for selling almost anything other than computer stuff etc..

I just removed a bunch of listings of excess stuff that I have that is just lying around like a DVD game, new 1000 piece jigsaw puzzle and a few other things. Even listing most of them at £1 there are no bidders. I've given up and am just going to take them into the game shop and see if they give anything, if not they're going to the charity shop.

Luckily I have gotten rid of most things of value slowly before sales are basically non existent, I'm not keeping them around just to clutter the place up when I'd only get peanuts for them on eBay anyway, months of checking/relisting just to get maybe £10-20 at best or less.. No thanks.

Certain things will sell but it's normally in demand items/electronics, anything else is almost painful to even bother listing and waiting.

I have the same problem, sales are down

We are currently 54% up on this time last year and I don't promote anything.  I strongly believe the ebay search algorithm is and has been messing many sellers up for some time, surely a search button should search for what's been inputted into the box by a customer? not what ebay wants them to see.

I have sold a fair few items that have had no interest for a couple of years or views? they seem to of come alive this year in the search results?