Negotiate

It all depends what it's worth to you and your business. How much would it cost you to grow an equivalent round? Is it in a local area? All easy cleans? Compact? .... all those normal questions.
Difficult to give a straight answer because there are too many factors that are personal to you.
I always think of how much things are worth to me and walk away if it goes above.
I had my eye on a local round that started at 9,000 and now it's still not sold at 6,000 and I'm still prepared to wait I think 4,500 and it's a bargain... may not happen at all but something else will turn up that represents value to me.