^^^ +1
Some other tips are, find machines that are off-lease from big box stores like Walmart. They had service contracts so were maintained regularly.
Also, don't be afraid to look all over the country. We've been able to find better quality forklifts out of state, have them trucked here, and it still ends up being cheaper than what the local dealers want for their worn out junk.
Talk to a local service guy. He will tell you models & brands to avoid, things to look for, etc... Also if you go to look at a machine, it can be handy to call him up and get instant feedback.
Forklifts for the most part are pretty simple, an engine & hydraulics... But parts can be expensive or hard to find for some old oddball models. Usually engines are okay, it's leaky seals on the pistons or worn hydraulic lines or the drum brakes pistons leaking.
We have a couple forklifts, but 99% of the time I find myself using the smallest one, which is rated for like 2500 or 3000 lbs... Usually I'm just lifting stuff that is in the hundreds of pounds, or just a bulky pallet of stuff to put on the upper deck. It's the convenience of having the machine do it vs making a bunch of trips up and down the stairs.
Some people burn a hole in the end of their fork to put a ball on to move trailers. Forklifts are very convenient to move trailers and you can maneuver them right up against a wall if need be. However, that's not really a safe way to do it. I found a piece of thick-wall square tubing that would slide onto the end of the forks at 45-degrees and wedge itself on tight. I drilled a hole on the edge of the tubing to screw the ball onto that. I just slide it on when I need it, and have a little sledge to bump it off. That way too I can use it on any forklift. I made a second one out of a piece of round pipe that fit snug. To keep it from spinning I welded a piece of bar across inside.
If you can get a forklift with side-shift, it is worth the extra money! Even if they have to add it on for you (which is usually pretty cheap). Makes life so much easier than trying to line up perfect with something, or if you are in a tight space and need to slide the forks over so you can turn tighter to get out.
Most lifts are 2-stage which go to like 120-130", which is enough to get to a typical deck above an office. 3-stage go like 180-190".... But you sacrifice visibility because there is another layer of masts in front of you, and I doubt you need to go that high.
Browse around on
http://www.eliftruck.com