I generally don’t have a problem with low offers as I will politely decline. Where it becomes an issue is if you are offered a trade that is miles apart from the valuation on the watch you are listing.
There will often be a bit of a gap between valuations on trades, and this is just down to the perceived valuations of the watches in question (and I am as guilty of this as the next person). However, last week I was offered a watch that was bought from eBay the previous month for £500, in trade for a watch that I listed on SC at about two and a half grand.
The proposal was a straight swap, and the guy was doing his best to convince me that valuation was subjective and between us we could agree the values etc etc etc. Frankly though, I felt like I was being taken for a ride