24" bikes are a great size for adult pig bikes & usually in great shape since they're typically used a short time.

Funny you should mention that as this particular bike was the farthest thing away from that condition in fact one of the worst I've ever delt with being that I started with just the frame which looked like it had been beaten with a sledgehammer
This poor thing had dents top and bottom! Not too mention a stuck seat post that had been delt with before and pinched off, it had just enough left to grab and pinched it off again and that was with weeks of soaking it with penatraiting oil and everything thing else I had , oh yah I tried heat also I gave up on it a few times but I wanted to make it happen finally I drilled a big hole in the bb and drove it out with a piece of rod iron and a ball peen hammer .
Another thing I didn't have a gaurd for a 24" frame so I cut a section out of one for 26" as you can see in the pictures below how much I had to take out.
This bike fought me every bit of the way with every part , I had to put dimples in the bottom stays to widen the way so the thick bricks would fit also it was bent on one side and straighted that , trimmed the fender mount and also the chainguard after all the work I put in it , also upholstered the seat myself, it goes on and on lol..
It was well worth it I love riding this bike!
Rafael ~