It is very difficult to estimate price for second hand goods, specially second hand defence goods and depends on multiple factors. Because they are not in sale everyday and hard to get any reference price. For example PN liked very much those British Type 23 class ships as they are very capable but was out bid by Chile. I am sure PN offered the price which it thought was fare but Chile offered more. Now even after 8-9 years PN could not success in acquiring any second hand ships which it needs badly to replace old Type 21 Tariq class ships, though looked from Greece to Netherlands and last ditch effort still looking for OHP from USN. This has created a huge capability gap for PN. There is no price for defence of a country and for defence goods price does not matter if its bearable but defence forces should have right capability in right time. At least Pak government should negotiate with UAE and Qatar government the "right of refusal" for those Mirages so that if any other countries offer any price, Pak should be asked first to equal or offer more for it....The minimum I hope that those Mirages are not sold to IAF at any costs....