SF: Everything everyone says here so far is true. I owned one for years, up until last month. They are unique, to say the least. (Check out the Harmony-Central reviews on this. One of them is from me.) Some thoughts:
-- Good thing you are close by. These can be damaged in shipping ... top supports often get broken, and are tough to fix.
-- The 7189A tubes are worth the trouble, if you're fond of EL-84 type tones. Not quite the same, hotter, more punch here, but not worlds away. When you do find a good matched pair, they'll last a long time.
-- If you're lucky, you'll find the stock Jensen C12P speaker, small magnet ceramic. Mine had (has, I still have it) the "whizzer" cone, and remains one of my favorite vintage speakers.
-- I see staining on the grill. Make sure this is not water damage. That would make it a rather risky proposition, unless the price stays real low.
-- A maggie-savvy tech is essential. It will save you (and him/her) grief. There is a tech learning curve on these ... better they don't learn on yours.
Mine came so stock and in such good original condition, it still had the original mullard pre-amp tubes. A hot, voxy kind of sound. Nowhere near the claimed 36 watts. Actually around 20 or so. Amp can get REAL swampy sounding, with that kick-butt vibrato, and the extremely flexible tone-shaping options. Including a way to run both channels without jumpering. The vibrato on these sounds different from other maggies. More chorusy, not "watery". It's addictive. Great reverb. It's a wonderful amp. I miss mine ... have too many amps so one had to go. Best thing about it: people laugh when you drag it to a jam. Usually no-one has ever seen anything like this. Then, when you turn it on, everybody has to have a closer look. Because it sounds SO GOOD. It's a natural for retro, Link Wray crudeness. It's also one of the best jazz amps I've heard. Has as much or as little refinement to the tone as you care to dial in. I haven't played all the suitcase amps, but this one is, IMHO, the best of all.