It's not worth $1500 in my opinion either. Not even close. That car's too rough. I do auto resto for a living, so have a pretty good sense for these things. There are many much better 79 TA's for sale, for not that much more money. 79 had highest production of all the years, so there are still many to choose from. And while the value of them is rising some, they are still priced very reasonably, unlike the earlier TA's. So I'd spend a little more for a good one. Actually, if you have the money, you'd be ahead moneywise if you spent a substantial amount on an excellent original unrestored example. The better the example you buy, the less you have to do and spend on it. Someone once said the cheapest car you will buy is the one that you spend the most for to begin with
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But I didn't follow my own advice and bought a 79 TA 2 months ago for $1600 and drove it home. It wasn't quite as good as I wanted, and was going to walk away, but when he got down to $1600, it was a good deal and I took it. The body is much better than the one in your pics and the engine runs perfectly, having been recently rebuilt. Mechanically it's good. It will still need body and paint and interior, which I can do. So there are good deals to be had. I've seen some good deals on eBay.
I've been gathering the parts I'll need. I have spent twice what I gave for the car on various interior parts, emblems, spoilers, lenses, w/strips, etc. I'll probably have $5000-$6000 in parts before I'm done. And that's with no mechanical or body and paint work. And the body and paint work is even more expensive, if you don't do it yourself. So that gives you an idea of the other costs involved when you buy one that needs all the cosmetics. You can probably save $3000 easily by buying a car with a nice interior to start with. So good luck with your search.