The weight system of an anvil is only a google away:
anvilfire.com Blacksmithing FAQs Anvils
You do the math, 142 pounds? (check that please, its your question)
The price seems high, but you are always free to negotiate. I would say the base
welded does hurt the price. Looks like a $200 value as-is? I am neither a pricing
price expert or anvil expert. If you need a tool vs just collecting for fun makes
a big difference what you will pay and how long you shop around. Condition of
the surface and edge is important for a working anvil and good condition may
justify a premium for a fine working tool. But again, I am not enough of an anvil
guy to say what a pristine surface is worth vs. one with typical dings and sway.
Anything can be fixed, and after fixing the value is higher.
Edit:
You mixed me up, you already have a 1-2-2 and asking about another larger maybe?
for an honest 200lb no-exaggeration anvil, I might offer $250 - A start
2nd edit:
The seller claims to be a blacksmith, this is always been a big warning sign! I would not
even think of buying tools from a blacksmith. They value/appreciate the stuff too much.