That's true for most cameras in that vintage. Light seals are the first thing to go. TLRs and folders all have (well, most do) seals. Don't let that scare you though.... they are easily do-able. You can buy a kit with instructions and do it yourself really cheaply and in few hours.

Right now, someone is selling 6x6 in APUG classified. You might want to go look at it.