Offhand I think an Advanced Jumbo is higher-end in Gibson's line than the M-36 is in Martin's. The jumbos from the 60's and earlier are going for big bucks indeed.

Personally I prefer a guitar with more immediate sound, cause I hate waiting around for things...
2 Advanced Jumbos at Elderly now

I presume yours is Indian rosewood? And a reissue model? Still a valuable instrument at 2-3k US.

And a used M-36 also offered by Elderly

Used versus new prices are obviously not a very accurate comparison, but I bet you can do better than an even trade. After all the other player obviously wants your guitar, while you're not sure. Since the M-36 is a modern model, it probably doesn't need a neck reset, but a good setup. At the very least, I would take it to a setup and regulation specialist get an estimate, and roll that number into your trade negotiations...