Upload & Sell: Off
The 24/1.4 is the one lens not to sell. Try to find something else that you can sell to raise money. Don't think about the 24/2.8, I had one, lovely lens, but not in the same league by any means (and it does not outperform the 24-70, either, not even close). The only lens that is somewhat comparable to the 24/1.4 is the Zeiss 25/2, but even that lens has worse corners than the 24/1.4 (less CA though), and anyway it would not help you money wise.