The Google Pixel 9 (Photo by Justin Sullivan/Getty Images)Getty ImagesNot to be outdone by Samsungs huge Galaxy phone sale, Amazon has slashed the price of the Google Pixel 9 and Pixel 8a.The deal knocks $150 off the base Pixel 9, bringing the price down to $649a 19% discount. The Pixel 8a gets an even bigger 20% price cut, dropping the final price down to $399. The Pixel 9 Pro and Pro XL are still at full price on Amazon and at the Google store.Amazon has some of the best smartphone deals around if youre not interested in bundle offers, or if you dont have a phone to trade in. For example, it has undercut Samsung and Apple in previous sales, producing some of the lowest pricing Ive seen for Galaxy handsets and iPhones.This is, however, balanced by the companys poor trade-in pricing. In a December Samsung Galaxy S24 Ultra sale, Amazon offered $5 for the 2017 Galaxy S8 Plus, compared to Samsungs $300 valuation. Or $135 for the 2021 Galaxy S21 Ultra against Samsungs $650 price.The new Pixel 9 Amazon sale doesnt even have a trade-in option, hence the size of the bargain. If you do have a phone to swap then it might be a good idea to wait for Googles next sale. It wont be long because the company has run a promotion almost every month over the last year.Will The Google Pixel 9 Price Drop Again?Dont ever feel rushed to take advantage of a smartphone deal because they are discounted repeatedly in the modern age. Samsung, Google, Motorola, retailers and, to a lesser extent, Apple (via surprisingly competitive trade-in pricing) are locked in an increasingly aggressive price war as people hold on to their phones for longer.Despite the size of the deal, this Pixel 9 and Pixel 8a price will surface again. The Pixel 8a could be even cheaper after the Pixel 9a lands this month. You may get a better price outside of Amazon if you combine a decent phone to trade in with a discount.Googles trade-in pricing doesnt match Samsungs insanely high valuations, but a recent sale showed that Amazons price can be beaten. Googles January promotion also discounted the base Pixel 9 to $649, but included enhanced trade-in pricing. If you had a Pixel 6 Pro ($360) or Apple iPhone 12 Pro Max ($330) you couldve picked up the Google phone for under $350.If you do decide to buy the Pixel 8a, it is worth pointing out that the Pixel 9a may not be a major generational leap from its predecessor. You may not miss out on much.Googles phones stand out because of their software. The companys crown jewel features, such as seven years of software support, some of the best still photography on the market, AI image editing tools and quarterly feature drops are available on the Pixel 8a. In any case, it is worth waiting for the Pixel 9a launch before deciding because Pixel 8a prices will only go down from here.