I bought three brand new WS-1000 digital scales with read out from usedscales.com. I think the set ran me under $700 and I have 9 airplanes to weigh so figured it was worth it. I can unload them on eBay or Barnstormers for a large percentage of their value after I am done. So far I have done a Grumman Yankee and a Luscombe 8A. I still have to do a Cessna 140, Comanche 260B, Vans RV-8, Cessna 180J, Bonanza V35B, Vans RV-4 and Nanchang CJ-6A. The heavier aircraft may have to have fuel removed so as not to exceed the 1,000lb limit per scale. They also have 2,000lb per pad scales but the precision goes down to 2lb increments instead of 1lb increments.
Here is a link:
http://www.usedscales.com/ws_and_ps_race_car_scale.htmI wanted the 1lb precision.

Jim