As mentioned above, you should be careful.
FYI, I'm a relatively new TB member, who has never sold anything here on TB, but I did buy 1 bass from a fellow TB'er, which is how I learned about this forum in the first place.
You may not realize that when doing an internet search for basses, TB posts pop up in the search results, which is how I found the bass that was for sale on TB and learned about TB in the first place. This may explain to you why you are receiving various odd "odd-ball" responses from people. They are not necessarily members of the TB community, fully understanding the various rules and the camaraderie that is shared here. They most likely view your classified as as just another "for sale" posting on some forum, and they decide to sign up to the forum in hopes of either finding more deals in the future, or out of curiosity.
I'm not defending why you should sell to them. I'm simply trying to explain why you may be getting these types of responses you mentioned.
Best of luck!
-New York Bassists Club #68
*Rockin' Carlo Robelli basses since 2006!*