There are too many different little problems that require attention- it doesn't just work and it's not reliable for regular use.
My van has several small "bugs" that I have dealt with since I bought it. The headlights and tail lights frequently need to be changed. It takes a minimum of 3 tries to start every time. The engine is placed in such a way that "simple" repairs, like replacing a spark plug on cylinder 1 require that the entire engine be unmounted and shifted to gain enough room to reach that one cylinder head. I bought it used, but the quirks and kinks that I go through to keep it running make me wish I hadn't bought it at all.