Offers , I think they drop prices.

I've been away from ebay  for 18 months, because of health problems. Now back I'm finding that there are offers on a lot of my posts, this was rarely the case before.
These offers are of course private and often below the starting price. This devalues the article whereas a bid will increase the value, making it obvious that others want it. My feeling is that an offer should be public or maybe I can turn them off, can I ?  What do there think , maybe a counter saying how many offers made ?