Oh - and if you know of a good website to buy one off of, that'd be great too. I don't want to get robbed

and no one around here sells palms unless you want something not cold hardy for your insides.

What I've bought around here for palms -

Majesty palm (indoors early-november to mid-march)
Pygmy Date Palm (indoors "" "") - SURVIVED DROP TO 25F!
Cycad Sago Palm (indoors early-december to mid-february)
Mexican Fan Palm (outdoors all year long with extraordinary protection)

Don't have the experience to give you advice about odds of survival on your windmill in 6a, so I'll leave that for the rest of the gang. If your just looking for a windmill 2' or so, I found some on ebay for $6 plus $15 shipping. Even less if you buy more. I recently bought 4 from him for a total of $51 delivered at my door. They are 3 gallon, about 24" tall, and couldn't look any better. I've had them in the ground for about 2 weeks and they're doing great. Go on ebay and look up stores, the name of the store is mlbnh1003. He keeps lots of plants going on auction all the time. Much cheaper than anything else I have found. My local nursery had essentially the same plant for $55 including tax. Good luck.

Sorry-correction,
store name is mlbnhl1003

btleroy, I'm from Merrimack Valley in Mass, I don't have experience with trachy's in the area, i know someone from Hardy Palms and More for the Northeast who post from Southern New Hampshire who's been growing them for a couple years outdoors. Ask him the same question that you asked.

I grow two windmill palms in my Connecticut location- a zone 6. I am inland, northeastern part of the state. One palm is a 'Fortunei' the other a wagnerianus. Both palms are planted in a southern aspect- near a patio, protected from the north by the house.

They have survived three winters- with a covering of a plastic greenhouse with no heat. Both plants suffer cold damage to their leaves- this past winter the 'Waggie' suffered the most- but neither palm suffered spear leaf pull. Both are growing again robustly.

My climate here is slightly milder then your location. The zone 7 line is creeping north about 2.5 miles a year from the coast- so in about 20 years I will be a zone 7.

The trick is to keep these palms totally dry in the winter- they go into a sort of 'hibernation' below 30 degrees.

Well, Trachycarpus fortunei is probably your best bet. Your cool summers will not deter it from growing. Unlike many of the more tropical species, T. fortunei really slows down in high summer in warmer zones. I protected mine minimally the first two winters by decorating the trunks with X-mas lights then wrapping with a very shear, white "blanket" that I picked up at the nursery. You can see the lights beneath the blanket so it looks really decorative and cool for the X-mas season. So far, I have not had a problem with loss of the center bud (despite a very wet winter last year). Both are planted on the south side of the house. Yes, they do burn some after the Winter but they are in active growth by late February. So far, they have seen a minimum of 4 F., snowstorms and ice storms. They are unusual in that they do seem to go in a cold-induced dormancy (unlike other palms). They actually handle long, cold, and WET zone 7 winters very well as long as minimums are not too arctic for too long and the soil drains. Good luck!