Hi Lemon,
In the current climate there are ample properties that you can pick up at 10%-15% and even 20% BMV even if if you are a first time buyer, its having the knowledge or help.
I would suggest that you look at the FTB situation and offer them something differant that is not on the market.
Look at the Interest Rates for 90% Mortgages not too great. Look at 85% or even 80% (Cash Back, Gifted Depost) still available
Look at the associated Fees to high. (Cash Back or assistance)
Look at speed of completion. (Recommend, Advisor, Solicitor, Developer ect)
Put your self in there shoes, I hope this is food for thought.
Robbie
Look at the whole package and offer them a Unique Selling Point.
Good words are worth much and cost little