A couple of suggestions
When looking at Acaeum pricing, consider that it is more than just eBay solds.
Also, a Buyer that you happen to be dealing with is not the same person that won the item listed on eBay. I deal with people locally quite frequently to buy items and when they say "Well it sold on eBay for $X, that's what I want". If I don't like the price, I'll say "If you want that, you should sell it on eBay then" and I don't mean to be a smartass about it. It's just the fact that I'm not the person that is willing to pay that much for that item.
I've also been on the other side of it too, where I was the only person willing to spend what a Dealer was asking on an item that at least a thousand others had looked at and said no. So don't be afraid that you aren't coming into an agreement on the deal with the first person interested in the items you have offered.
You'd like to get as much as you can and be fair about it, the buyer wants to pay as little as he/she can and be fair about it - and that's just the best scenario.
I bought my 2nd print
PHB about a year ago in VF+ condition with no writing in it, etc for about $30 including shipping. I shopped around A LOT before I finally pulled the trigger on one though. I saw plenty before then and more since get more money than what I paid for mine.
A 2nd print set of the OD&D books (no sheets or box) sold on eBay a while back for $931. I don't remember exactly what condition those books were in but I'm pretty sure they were in better condition than yours. Low grade, highly desirable items are absolutely the toughest things to figure out pricing on in any field of collecting though and every Collector is going to figure value on such items differently.
I paid almost nothing for my
NM to Mint 2nd Print Blackmoor but it came in a Collection so I'm no help there, sorry. But again, I spent a lot of time looking before I jumped on one. My time has to be worth something while I was looking for one, there's always a trade off.
Hopefully what you get out of what I've written here is that selling is always a negotiation.
