Good thread. For me, making bitsa basses has been one of the most rewarding things about taking up bass, and maybe it was inevitable given my nerdish predilection for putting together Airfix models when I was a kid (I still have a boxed HMS Victory kit in the garage waiting for an idle weekend; bought close on 40 years ago......)
I certainly haven’t made any money on it but usually recoup costs when selling on, and doubt I’ve ever built the “holy grail” of basses, but it’s immensely satisfying - no element of it is particularly hard - and you can put together that dream bass that’s always been in your head.
For me, it inevitably starts around a single part that I acquire often for no particular reason (usually on BC) - for the most recent P bass build (pictured) it was the Oly White body, so the plan became a ‘70’s type Dee Dee Ramone / Paul Simonon type bass, fitted with the very nifty Stellartone Tonestyler. Current build started with a pair of Celinder Jazz p/ups acquired for a mere tenner, so it’ll be a more boutique type J bass (I’m French polishing the body at the moment, whilst watching the rugby.....)
Once you’ve got the bitsa bug you’re hooked......
edit: meant to say that apart from Chris’s 3 basses FS that I’d commented on; this one was the most impressive I’ve seen in recent years, you’d be pushed to find a kosher Fender this nice: