Again, the market for these things are personal preference. Team Shine is just a popular one, but when it comes to individual colors, there really isn't one that "sells" easier than others.I'm asking for the PC in terms of buying and reselling the items, I.E. which killstreakers/sheens will be easier to sell? I know I personally just want Team Shine/Mean Grean on my weps and I'm fine :p
5 killstreak (the minimum sheen) aren't that rare, especially considering the calculation for the eyes also includes other weapon killstreaks.Personally, I think all the sheens look nice.
Don't go with professional, it's really quite stupid and pointless, since you only get the eye effects after the killstreak, not like the sheens which are constantly glowing all the time.
As for pricing, it is still difficult at this time to say a sheen is better than another, since they really are personal preference. Team Shine probably is the most expensive though...