I just thought it looked quite cheap for a GS although doing a bit of digging it has not had an MOT since August 2023.
		
		
	 
Looking at the sellers' ad, nowhere does it even mention it being a GS 
Could be the seller got this C6 as a death in family, divorce, etc and has no clue as to the difference GS has over base coupe 
Seen something like this before as a friend of mine owned a 1992 C4 ZR-1 
Wife divorced him and she grabbed the ZR-1 
Unknown to my friend, the ex-wife sold it for the price of a base C4 sold for as she was too dumb to know what a ZR-1 was about 
He was pissed, as at least she could first have contacted him in case he wanted to buy the ZR-1 back 
