-Their landing pages are outdated and haven't really changed much in so many years.
-Their customer service is "meh" at best
-They have the option which says buy now / make offer, you click on "buy now", hence offering what the seller is asking and you think you got a deal! Not so fast, the seller can still decide to not accept the sale as it's a make offer /buy now, not just buy now. Yes, it makes no sense, but that's what happened and sedo support's answer was exactly that.
-They have the option to put a "buy now" strictly or "buy now / make offer". Guess what when you put "buy now / make offer" even though you have indicated a "buy now" price, when someone searches domains with a "buy now" parameter, your listing doesn't show!!
I contacted their support to ask why my listing doesn't appear in search results when someone searches "buy now" listings if my listing has a "Buy now / Make offer" option. The answer: it's not the same thing and we've found that "buy now" pricing helps the domain sell quicker... if anything I DO HAVE A BUY NOW PRICE, it's just I've put the option to potentially accept a lower offer also, but no matter what, the client that is searching for names that they can buy outright at a set price still gets what they want.
Godaddy's TDNAM thankfully shows all "buy now" listings regardless if just buy now or buy now/make offer which is only logical
I just put my names on there for the odd chance it sells, which hasn't happened with them for a very long time.. most of my sales are from personal landing pages or outbound