1955 Lionel 027 Model Train Set

What is a 1955 Lionel Train Set worth? It contains the following:
a.) Burlington GP-7 Diesel No. 2328 engine in Good to Excellant Condition.
b.) No. 6436 Lehigh Valley Hopper Car (Black) good condition
c.) No. 6465 Sunoco Tank Car (Silver) good condition
d.) No. 6257-25 Red Caboose good condition
e.) No. 6462-125 New York Central Gondola Car good condition
f.) No. 3469 Automatic Dumping Ore Car good condition
g.) No. 3927 Track Cleaning Car Fair condition
h.) No. 415 Diesel Fueling Station good condition
i.) No. 497 Coaling Station good condition

It also includes various other pieces and parts (transformer etc.). We have been offered $350- for the whole set. Is this a good deal?