European Aviation Air Charter (EAAC) have carved their niche by purchasing quality used aircraft from major airlines at bargain prices, most notably;
BAC1-11s from British Airways
B737-200s from Sabena
B747-200s from British Airways
Purchase of a very young fleet of B717s would be totally different from the way the airline has done business in the past. I'd like to ask one question. Why?
The B717 has far higher aquistion costs than the B737-200s EAAC already has, but carries fewer passengers and has a shorter range. You would save money on fuel and maintenance - but the initial costs of a B717 fleet would be high, plus they would make the already paid for B737-200 fleet redundant, and EAAC would have to try and re-market these relatively old aircraft for a lot less than they are worth to EAAC, due to the state of the used aircraft market.
The only rumours I've heard about future fleet moves for EAAC have been to add second-hand B737-300s to supplement and eventually replace the B737-200s. These aircraft would increase range and capacity, while cutting fuel and maintenance - and would cost a lot less than a similar number of B717s.
Just glad I managed to get a flight on an EAAC BAC1-11 (MAN-VCE-PSA-MAN)while they were still in frontline service in 1996!