Air Canada's Aeroplan program is having a flash sale, offering up to a 90% bonus when you buy points! That brings the price down to about 1.4 cents per point. Sounds tempting, right? Before you jump in, remember that buying points speculatively is usually a bad idea. Instead, figure out if you can redeem them for a trip that will give you outsized value immediately. If you've already found an amazing flight deal, or a way to use points for a business or first-class upgrade that would normally cost a fortune, then this could be a great way to save some serious cash. This promo runs through October 29th, so don't delay!