Your items look like Large Letter size but some of them look heavier than 100g, so I will say that RM gives you a Reference Number on your receipt for 250g LL size. This is an internal RM tracking number, and can be uploaded into your eBay INR cases like regular tracking. Since 2nd Class is 2-days per week now, and since RM shunt 2nd aside as the postage rush increases for the holidays, if it were me I would package LL items so that they weigh more than 100g to get cheapest tracking option. Otherwise I suspect things will only get worse in the coming month or so.

The reference number won't give you any tracking details on standard Large Letter postage - Large Letter items are only scanned at the point of delivery and then only if they have a Horizon label/barcode, there won't be any tracking of any kind if the LL is posted using stamps.  Standard 1st and 2nd LL are not scanned elsewhere in the network (and often don't seem to get scanned at the point of delivery by the postie either, it seems). 

Only an actual tracked service will give you any tracking details during transit. 

Unfortunately, since the changes to the requirement for delivery confirmation, ebay will now hold on to your money until after there is either conformation of delivery, or feedback left by the buyer.  If neither of these happen,  it is longer for the hold to expire.