I have a used set of BC Racing BR-Type coilovers for sale. The set was removed about 3 weeks ago before my '8 Solstice GXP was traded in. It has about 10k miles and it's clean and in a great shape (the car hibernated in winters). The spring rates were custom ordered so they are only 25-33% stiffer than stock rates. This allows a stock-like ride when the dampers are in softer settings.
I also have a Werks Racing rear subframe brace, a Covercraft custom-sized folding sunshade, and a Kappa Shield wind breaker for sale. Please send me a PM if interested in any of them.