This is more of a WWYD...
The sale of our flat has fallen through twice, we have a related purchase - they have stuck with us but are really losing patience, we are onto buyer number 3 now. Our solicitor is very good and is trying to move things very quickly for us. We have reduced our price by 15K for a quick sale and I met the buyers on the viewing and told them this. They said they understand and are able to move quickly. So far it has taken them 4 days to instruct their solicitor and they have not yet given the monies for searches. Our solicitor called theirs and they said 'I know your client wants to move quickly but my client is a first time buyer and is not in a rush, and wants things done properly'. I understand they want things done properly, but we were a day from exchange with our previous buyers so all the property information, management pack, enquiries, searches were conducted. Our solicitor has said two weeks is a reasonable timeframe for exchange. I asked our solicitor to ask for their phone number/email so we can talk directly to them and make sure we are all on the same page - the buyers declined saying they will only speak to us through the solicitor or estate agent. So I have written an email as below:
We have had a series of miscommunications from the estate agent acting on our behalf which is why we wanted to speak directly. We have been told that your solicitor was instructed and searches bought last Friday but it appears that this is not the case.
We are coming under huge pressure with the sellers of the property we wish to purchase. They are threatening to pull out if we do not have movement of our sale in the next week.
We have recently received an offer from another buyer who has said they are able to proceed immediately, we have told them that we are already under offer as we wish to honour this sale and I felt that you were genuinely keen to move quickly having met you both at the initial viewing. We would be willing to complete up to a month after exchanging contracts as I know you are in rented accommodation so I understand you might not want to pay rent and mortgage payments at the same time but we would like to exchange in the next couple of weeks. My solicitor has informed me this is perfectly plausible as nearly all the paperwork required was completed during the previous sale and we were within days of exchange.
Please can you clarify your feelings on timescales for this?
My contact details are below if you wish to speak directly:
Please can you tell me if I am being unreasonable in pushing this? DH says we should just leave it, but if we do, it will be too late if it falls through again.
Another buyer got back to us a day later than when we accepted this offer, offering 5K more and said they had just had a purchase fallen through and want to move quickly. I'm not so bothered about the 5K - I just want a sale that goes through to completion!!! But I think they might be a better bet, though they are young and might need parental input and change their minds?
Our previous sale fell through because there are roof works proposed on our flat for 10K and the parents of the buyers said that they are extending themselves too far and they tried to renegotiate down, but we found out about the roof works after the fall of our initial sale and had already taken 10K off and told them about it on the viewing so we said no... I don't want that to happen again...the latest buyer we have accepted are older but had only been looking for a flat for a week and apparently had told the estate agent they do not want to look at any one bedroom but 'fell in love with ours' which is one bedroom. So I am also nervous they might change their mind about not wanting a one bedroom....
I just don't know what to do, please give me advice!! 
if you got through all this!!!