All the Waterloo Treks from this vintage are pretty nice, and I really think it's worth $300. - although I'll concede that current market conditions in my market and many others are making it very difficult to sell ANY thing at ANY price. Maybe you too can make that work for you as a buyer as rekmeyata suggests. Even if not, you could still feel OK about the price.
So - if it's in as good a shape as it appears, and it fits you, I would not be a bad bike at all.
By the way - You need to ride it to judge the fit for yourself, because everyone is different.
(E.g., I am much shorter than rekmeyata, and yet I am most comfortable on my 60/62 bikes.)
YMMV, but just make sure that you are comfortable in the drops when you are riding the bike.
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