Yes, hard to beat the prices on pre-built dyno hub wheels. Bought (3) mine on Amazon (Taylor Wheels) for about $100 includes free shipping (from Germany)...Shimano Nexus dynos. Just needed tensioning and truing, but thats expected. Prices go up if you want Mavic rims instead of Rigida (now known as Ryde), but find the Rigida ZAC 2000 rims are decent quality that can take a lot of abuse and handle heavy loads. Check around the net for deals, Taylor Wheels hasn't listed anything at Amazon for months and their website ordering charges shipping.

But if you want SP or Son dynos and/or want double or triple butted spokes and/or new rim, the total costs go up for the parts and possibly labor.