Boston

[FERNANDO FERRA]

Best Model aircraft store in Boston.

[GordonTarling]

RC Buyer's Warehouse in Nashua, NH is the best you'll get in the area and well worth travelling for. No sales tax in NH either!

[Roaddog]

GT,
Can you post a street addr for that outfit in Nashua? We'll prob'ly be in that area over Xmas as my Wife is a Nashua girl and we visit her sister every Xmas.
Tnx,
RD

[BTerry]

Here you go: http://maps.google.com/maps?f=q&hl=en&geocode=&q=nashua,+nh+RC+Buyers+Warehouse&ie=UTF8&ll=42.799683,-71.497307&spn=0.067259,0.094414&t=h&z=12&iwloc=A

95 Northeastern Blvd, Nashua, NH - (603) 595-2494‎

I would second that recommendation. Also Ray and Robin's in Portland is great, but much farther away from Boston. I used to live halfway between the two and went to each one regularly.

[Dora Nine]

I can also vouch for RC Buyers. They tend to have pretty much whatever I've been looking for.

[MIT KID]

For something more local, there's Alex's R/C in Belmont. Not a very big store, but good for building supplies and such.