just get a piece of shit electric. the action should be high enough to play slide on. it works perfectly fine if you're not into dropping a few hundred on a decent one.
yeah i want a real one. so i can roll fat bones and get real strange. on second hand im not sure why someone would buy an 'actual' slide guitar and not buy a pos axe and just set it up proper. all you need is higher action, a sears robuck socket drive and your done.
Lap Steel or Pedal Steel guitars they are called. The pedal ones have pedals that do some shit, I dunnow what.
You can easily make a lap one, just use the strings that are wound for jazz guitarists. Round wound or flat or some shit...I can't remember...but they don't make that shitty scratchy noise.