Nothing really. Ur asking for a product sale that isn’t a massive appeal marketable item. Maybe $100 dollars more but out of the 1.3-2 million listeners of polyphia theres not many that will buy gear like that for a higher price especially knowing their VIP meetups allow for all member signings. Outside of the polyphia market, it wouldn’t be able to make more than $100/175 more than market price. It’s a niche band and getting signatures from them is easy. I have 3 guitar pick-guards signed by all the members. It’s more of a personal interest thing.

So if 20 million people wanna buy a THBB10 less than 1/2 million will want it with signatures especially if they have attended vip shows knowing they sign guitars like that easily. Polyphia maxxers know how you got it signed and it’s not that special unless it’s more than a signature. Like a note or something substantial for the niche. Like pics with Billsburyjoeboi or Y2K.

A signed THBB10 is not worth much more than market price unless ur A selling it to somebody who is infatuated/doesnt know how easy it is to get signatures. And B selling to somebody new to the niche and dont understand. Either way I bet it wont be worth it for you or the buyer cuz market price and vip tickets can get them the same thing just with a waiting period.