Are these still for sale?
If so, I have a PDF quote in my inbox from Kevin (I can send it to you if you like) for the kit at £870 new.
Without any intention of causing offence, all suspension components should be considered with care when bought used, so I'd like to suggest that this doesn't offer a large enough discount over the new price for me to commit.
Would you be interested in receiving a sensible and fair offer, which is more in line with what other similar sets (perhaps a few months older) have been sold for on this forum? - Again I can provide proof.
I'd be looking to offer around £600 including delivery, which I realise will feel like a kick to you, but which I believe is fair considering the current new price and that you're selling a part that will traditionally lose more than 50% of it's value after a year.
Judging by your other posts, these may not be off the car yet, so let me also say that I am happy to agree to a deal in principle and to wait if need be. Alternatively, if you haven't removed them yet because you don't have a buyer, I would be willing to pay a deposit in order to secure the deal and to give you confidence that you could undertake the work knowing you had a reliable buyer.