CONFIRMED mated pairs always add a premium. so 80 for the fish, add ~50 for the rbta, add ~100 for mated pair, and heck i'd pay a premium if i KNEW the fish were actually hosting...you're looking at $300-350max
Seems a bit high. Yesterday I saw a mated pair(GSMS) at my LFS for $100 and RBTA for $119(large). humm if it does not cost you $231 in gas... make a trip to dallas.