Go Vacations is one of several names for a big Ebay reseller of TS in Bozeman MT. They are legit but inflexable. They require their closing company (which they run) to do all closings. They require closing on resorts which no closing is possible such as non-deeded properties. (like TS point memberships).
If you get a good deal from them, I'm sure you'll be happy. But, for some TS (like worldmark) I'd stay away, since they'll charge you $450 +$100 resort transfer fee to close when there is nothing to do except notify the resort and pay the $100 transfer fee.
On a side note, I just bought from another big Ebay TS reseller, Holiday Group. They also charge $450 to send a letter to the resort to do closing. (the resort did the closing for an additional $350) but the deal was so good, I was happy to do the deal anyway.
Good Luck