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What are BBC 990 heads worth?

7K views 11 replies 10 participants last post by  70Underpressure  
#1 ·
Wondering what a set of 990 iron heads are worth?

Professionally ported, flowed (don't have flow numbers) but done right
Manley oversize stainless valves (don't remember size exactly but 2.25 / 1.90? I think)
New Comp Cams Springs (1.625 roller cam springs)
Titanium retainers

Milled .010

Looking to sell and wondering what they might be worth?