Very expensive these days to collect diecast model cars, especially 1:18.
1:43 is cheaper but even they are rising in price too.
I am lucky I have an understanding wife that allows me to collect them, but then I do keep them in my office in cabinets.
Last valuation was £25000, but there have been many additions since then.
When I first started MK1 and MK2 Escorts were £20 - £25 each, now any new ones are at least £50 due to rising costs