The short answer, almost always, is, "It's worth what one will give and the other will take."
All seriousness aside, there are two inline eight-cylinder Buick engines in 1948.
Special and Super series cars were powered by a 248cid engine--small bore, long stroke, good low-speed torque, but long and heavy for its cid.
The Roadmaster series is powered by a 320cid engine--larger bore, longer stroke. This engine is long and heavy, but it will make good power in a street-driven vehicle, and some intrepid folk have raced them with some success.
Your first task, it seems to me, is to determine which of these engines you are offered. Then you want to determine its condition--is it complete, is it undamaged, does it run?
If it's what you want, you can ask the seller what will buy it . . . or tell what it's worth to you. If you agree on a price, you have a deal. If not, you can keep looking.
If you're selling such an engine, then i should think that the 320cid Roadmaster is worth more than the 248cid Super/Special engines. There are fewer of them, and they make more power. You should know what it's worth to you . . . to keep it or be rid of it.
God's Peace to you.
d
Inliner #1450
