surprisingly, tesla offered more than anyone else. it's my mom's old lexus she was going to give away anyways (2006 lexus LS 430 I think, with almost 200K miles) and while carmax and others offered around $4K, tesla offered $5.6K, so I figured I'd go with them. also much more convenient to just hand over the lexus when I'm going to pick up the tesla.
if my offer expires, I might go back to carmax and see what I can get to avoid this whole trade-in valuation delay, but if they're still offering $1K less then I think I'll have to go with tesla in the end