[abadid]

IMO, it's hard to put a price on strong isolation and consistency. Being able to write an app that that uses atomic transactions, that are isolated from concurrently running transactions, and that see the correct data is something that translates to reduced programmer time and effort, and improves user experience. Many programmers discount those important features when they start out, but they'd be better served including them in the price comparisons of different products that are out there.