firm sale
noun
ukus[CorU]COMMERCE
asalein which thebuyeris notallowedtoreturnthegoods:
Noreturnswill beacceptedforitemssuppliedonfirmsale.
[C]
asalethat has beenagreedbetween asellerandbuyer:
At thisstageyourofferis now afirmsaleand thehouseisnearlyyours!