Robert there are some really pretty pieces in the collection. However there are others that get seen fairly regularly or which are rather plain and those I think you would not want to pay a huge amount for. I think £300.00 is also too much. I don't know how to suggest you work out what you should pay, but if it were me, I would start by allocating the pieces that others on here have said they like

, then add to those the ones you really really like, then leave the rest to one side and decide how much you feel the ones you've allocated would be worth to you (ie if you saw them and loved them what would you be prepared to pay for them individually - personally I would also research them on the net before deciding a price each to be honest). Yes that way you may leave out a fantastic piece worth a fortune, but at least you've picked the ones you love, which to my mind is always worth paying for - it also means you can live with them as you chose them because you love them. I'd offer on those only.
If the deal is to take all of them, then work out what the ones are worth to you that have been left to one side unallocated and add it to the cost of the ones you really want. That should come out at less than £300.00 as far as I can see.
m