Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.I’ve been getting a lot of emails asking whether Delta’s current promotion to buy miles with a 75% bonus between now and March 31, 2012, is a good deal.The short answer is: no. Certainly not in comparison to past bonus offers.Delta’s bonus promo chart.As I wrote about in this post, Delta sells miles at a pricey 3.5 cents a piece plus a 7.5% tax. With this promotion, you could get up 105,000 for $2,257, or 2.2 cents each. Better than buying miles outright, but still very unimpressive – especially since Delta recently let you essentially buy miles for 1.1 cents each through their 100% transfer promotion. I personally would hold off unless you really need to top up your account.