First of all, one question: is it red or black?
If it is high speed red 4/0, it might have some (and not really low) price for collectors (unlike current Senator "made in China"!). I will not be surprised at all, if you will have offers around $100 - $200 for reel like that if it is in a real good shape.
Second thing: I'm not 100% confident, but HT-100 stack should go no more than $5 - $10 (plus S/H).
Third: it is still a nice reel, even today!
I like older reels, and you might know: people could catch real good fish in 60s )))) Pair it with some glass rod with wooden handle and metal guides, and you will fill GOOD on a boat!