Each kit, which yields 89 usable tests, will sell for between $1 and $1.50.

A five-piece kit sold complete with hardware will typically come with one straight and one boom stand.

Many kits now sell for less than $15, far below the typically hefty doctor's fee.

The kit sells for about $35 at computer and electronics stores; more information is at www.verbatim.com.

Although rather expensive to purchase, the kits and radio systems sold rapidly.

Solomon gave them some statistics but said there was no way of knowing how many kits an article would sell, maybe a hundred, maybe a thousand.

These kits sold fairly well and can still be found on auction sites such as eBay at reasonable prices.

The kit, less engine, sold for £15,000 in 2011.

The kit sold for £900 but only about 25 were completed.

The kit sells for £79.95 direct from: