You're kidding, right? Good luck finding any Alembic guitar under $2K these days. In the bass world, the Exploiter body shape adds significant value. That's especially true at the lower end of the scale. A Spoiler / Exploiter could get $2000-2500 when a stock Spoiler was more like $1200-1500. I don't think it was ever as significant on the guitar side, but there are probably a lot fewer of them to make a market.
I'm not a big fan of profiteering. If you offer it for a price, you should honor it. Of course, if no one buys it, feel free to change the offer. That seems to be happening here, and I wouldn't be surprised if this passed $2500 before it's done. Kind of greedy to push the reserve past the old asking price, but it's not against any laws I am familiar with. It's a consignment deal, so it's not necessarily the shop that's setting the price and reserve.