Congrats Valerie. Pleased as punch to hear you're heading into the dark.
Check to make sure the condensor and lenses are fungus and scratch free.
Also, if you will be using it for 35mm and 120mm, check to see if the enlarger comes with a 50mm and an 80 or 105mm or larger to cover 120mm. You can buy better lenses later, but just something to ask when buying.
A manual is always nice, but not necessary. Plus, you can get them online.
Does the unit come with negative carriers in the sizes you need? Easy to get extras online...but something to ask.
Oh, and make sure there isn't a spiders nest inside your condensor drawer.
Just found a massive tangled web of creepy crawlers inside the Bessler I had in storage---Not sure how the little buggers got in there, but eeeeek! Can't say that will make for crisp enlargements.