None of my Poulans are museum quality but if I needed to "work" with a saw they would be the last ones I would grab. They are kind of hard to find around here and they are just going to get harder to find as the supply gets used up.
A used Dolmar 7900 or large Makita can be found for around the same price as a good condition large counter vibe Poulan. The advantage of the Dolmar/Makita are two fold. Replacement parts are available and reasonable and more important, to a guy who going to be using a saw a lot, they weigh much less.
Largest countervibe I have is a 3400, and the most I have paid for one is 40 bucks. I just haven't found a larger one yet for sale cheap used around here. The 3400s seem to be more common. My 245a was under one hundred, new lines and stuff included (weight on that one is comparable to a new plastic saw of similar engine size). So they aren't antiques or collector items for me, they are "cheap used saws". Show me a running or dang close to running dolkita 7900 for around one hundred and I'll buy it, or like any other modern, still cheap and easy to get parts 70 cc + saw. I would like to find a used larger bar than a 20 to put on what I have for the much bigger stuff, hasn't happened yet, it will sometime though I am patient.
You just got to use what you have, as said above. In the early 90s I could have afforded to go pay cash for any of the largest saws made, but then an accident happened, went broke and homeless. I am supposed to be in a wheelchair or a walker now, but beat that., real freeking painful but I beat it, at least to the extent I can most of time work and function and walk around. But it is just too hard for me to work real full time and be dependable for anyone, which means "cheap rules' around here.. Have to work cheap part time and do what I can. The job I have, when I have my totally random out of the blue relapses, it is OK if I lay out for a week. I can't do that very many places, you'd get canned quick after around the second time it happened. That's just my reality now. It doesn't pay much, but "some" and is better than trying to go on disability/welfare whatever, IMO.
So for now it is cheap used saws, however someone wants to classify them. I am down to only a couple more "things" I can afford to sell off or swap with, already before sold off everything decent I had, guns, tools, furniture, appliances, you name it, they all got sold to cover bills until I had to just give up, walk away from my house, rent a cheap storage unit and live in my van for a long time. Worked my way back up to this gig now, best I can do, got a roof over the head and grub in the box and some saws and got some more tools. Run real old rides that I have to work on a lot to make decent enough to use.
Heck, I am real happy I can run saws and still split wood most of the time! For real, it's great! Dealing with wood is also part of my home therapy action, it is good exercise and helps keep the muscles toned and some weight on, while also accomplishing a needed task, keeping my fields and fencelines I am in charge of cleaned and for heat for us.