You're getting good advice. First off, the wholesale cost for a domain is about $6. It's very hard to find someone to sell them lower than $7. At $7.29 you are getting a good price, unless they are .infos...!
I assume your time is worth something, so you need to realize what it's going to take to work with and manage that many domains. A lot of time. I only have 1,200 and I can't keep them all current like I want to.
So how are you going to find 2-3 thousand domains that someone will want to buy, but has not. You are going to register domains that are not registered? If they are .coms it is not likely you will sell them unless it's on ebay for $0.99 each.
Even so you have to set up all the auctions, or are you going to sell all the domains at one big auction?
Then you will have to push all the domains to the buyer or buyers, and that could take weeks.
Unless you already have all this planned out and you know how it will work, I would say do a test with 5-10 or 100 domains, but not anything more than that. If your system works, then repeat it on a larger scale.
I think most of us here have lost a certain amount of money when we got into this business. Do learn what we learned and pay even more than we did, unless you have the money to burn. If you do, then go for it!
