If you can, go to a tack store and just sit in a bunch of saddles. See what fits you and what’s comfortable and puts you in the right position. Try 16", 16.5 “, and 17” to see what works best. Wintecs are good, durable saddles, but many people find they put them in a chair seat. I have two, and do not have that problem at all. Not every saddle puts every rider in the right position!
A well-built older saddle can be a great find, but if you’re looking to show, I’d go with a more up-to-date close contact–many more recent cc models have a deeper, stickier seat than older really flat ones. The AP’s you’re looking at look dated and while labeled AP, many, if not most, AP saddles don’t put riders in good position for both flat work and jumping.
Lancers, IIRC, was a super-cheap economy brand back in the day, like Kincaid etc. It probably cost the same new as that used price, and they looked as cheap as they were.
That said, there are plenty of decent mid-range saddles that can be had used for a reasonable price. Older Collegiates (when they were still made in Argentina), Toulouse (I rode a school horse in one and found it comfortable and nice enough looking), HDR, Circuit are all decent saddles.