I’ll be that guy..

I would put zero dollars in 27” wheels and tires, longer reach brakes just don’t cost enough to make me buy in into a dead wheel size. 32/36 spoke 700c wheels can be found dirt cheap and the tires and tubes are far more plentiful. A drop to 700c will also allow bigger tires which is plus for most of us.

Before I bought anything I’d make sure the seat post came out and the bottom bracket and headset wasn’t turning to dust.