I just got a Thumler's Model B this past weekend - already ran three batches through, and love the result.
I got the tumbler from Cabelas US, and the SS pins from Pellets LLC (search the forum, or just give them a call - they sell in 5-pound bags. I bought four bags, and may sell-off two, just want to give the guys at work a chance.
5 pounds of pins, 3 pounds of 9mm brass (about one margarine container), fill the tub with water up to about 1-1/2" from top, a tablespoon of dish detergent, tighten it down and walk away for 3 hours. I was amazed at how BLACK the water was when I poured it out - I won't be using my Lyman vibrating tumbler anymore (will post that for sale soon too).
I HIGHLY recommend it. The four bags of pins, plus the tumbler and a brass pre-cleaning solution set me back $325 plus $40 in taxes at the border. I'll be able to sell $100 of pins, so say $200-$225 plus taxes (and plus shipping and brokerage, if required).
There's a place in Canada,
www.canadiantreasureseekers.com, that sells the Thumler's but they were out of stock, according to the website.
I just posted the unboxing, assemly, and test video (8 minutes for all that
http://www.youtube.com/watch?v=KEo5tS4jbes