If you buy one with no goodies, figure $400 for Kurt vise, 400- 1000 for a DRO worth a darn, 100 for a few good collets. Drill chuck, end mills, add another hundred or lots more, and if you want power feed, the Chinese ones are approximately 300 per axis. Tooling adds up but it can be bought later. Accuracy is very expensive to buy later. I know guys who have bought clapped out lathes and mills who constantly complain that holding 1 or 2 thousandths is very difficult. If you are inexperienced on a machine it would serve you very well to take someone knowledgeable with you to check one out if you are spending money you can not afford to loose. Any machine I see with fresh paint on , is a huge red flag to me, I immediately suspect is falls in the polishing a turd category. Great machines don't need stinking pretty paint jobs to sell them, the feel of the movements and measurements of parts machined prove their worth.
The dealer is long gone but I believe his treatise on buying a used mill is still online somewhere, I believe his company was Mermac, or something similar. Reading that years ago kept me from buy a lot of crappy machines that were enticing.
cheers
michael