$35 at a Thrift store

Found at an out of town thrift store while on a travel trip for $35. Cracked the lid to see the LEGO base for set 6270 Forbidden island. Upon opening and researching some parts, there seems to be 5+ huge sets from the 80-94’ era. Including the 6990 Futuron Space Monrail, 6396 international airport, 6077-2 Forestmen River fortress, 6278 Enchanted Island. I was impressed that the monorail still had power after taking corroded batteries out and cleaning the copper. I just finished rebuilding my first set out of the tub (Forestmen River forestress). Some parts to builds and minifigs are missing, but nevertheless a find of a lifetime!