For me, it has already reached that point unless you are a lone person with no requirements for a higher set vehicle and enough boot space to carry mobility aids. I’ve been priced out and at the end of this (extended) lease, will probably be leaving the scheme as there is nothing suitable for less than 2k advance payment available. My current car had an advance payment of £645, for the same car now it is over 2.5k. Any car I get privately will have to be less than 1k, I just don’t have the funds.
Sorry to hear this Sue, sadly you won’t be the only one in this situation, Have you considered asking for grant, using the 1k if necessary to top up the grant. It may be a a better more reliable option for you.