RE: Considering buying 5 y/o Nitro Cars from Storage
RS4 extremely common vehicle that has tons of parts
As for fuel lines don't worry about that most hobby shops you can get 1 foot of fuel tube for $1 that I dealt with. Glow plugs last I bought then were $6 a pop or so. Even the battery holders aren't that expensive.
Only things would be if the engines were properly broken in, taken care of, and stored in a dry environment so rust wouldn't form in the engine.