For $100 it's a good deal, for $50 it's a steal! That enlarger should have a filter holder under the lens, and it also has a slot just below the light source (behind the 23 II plate) for the larger 6x6 filters etc. So you shouldn't need to hold the filters. It's a really nice, well built enlarger. I would check to make sure the bellows are still attached to the metal frame. When I got mine it looked mint. Then I extended the bellows and it wasn't attached on the bottom anymore. It was an easy fix. Beseler still sells parts for them if needed.
That easel alone goes for around $40 new!
Good luck and enjoy it