The deck is balsa, the stringers are wood and balsa.
Decks generally dont have issues on express cruisers, mainly because there is air and stowage below the deck. However searays from the 80s and 90s do have transom and stringer issues. Just like most of the boats from that era.
Trailer queens and barn finds are not immune to rot, especially 80s and 90s boats
Add up the materials to replace stringers, transom, flotation foam, etc. Not even talking interior, motor or drive. That is $3500 or more in todays money
Most likely once you pull the drive and motor to repair the transom, you will find a hand full of issues to address. That easily eats up $1000 easy just on things like gimbal, bellows, bolt kits, flappers, hoses, etc
Helm, deck furniture and cabin furniture will cost over $2k even sewing the skins yourself.
Replumbing the black and grey water tanks, fixing blowers, pumps, etc will eat up another grand plus
