As of September 2026 · 127 listings tracked across Amazon, Walmart & eBay
Right now the best value is 8.3¢ per fl oz — Alani Nu Protein Shake, Munchies, 12 fl oz, 4 Pack, Bottles, 30g Prot… (48 fl oz, $3.99) on eBay. See it on eBay →
Prices change fast and stock disappears faster — YMMV.
The pack-size trapThe biggest pack we tracked (198 fl oz) looks like the bulk play, but it runs 26¢ per fl oz — the 48 fl oz pick wins at 8.3¢ per fl oz. Bigger isn't automatically cheaper.
Median across all 127 tracked listings: 18¢ per fl oz. The worst deal we saw ran 36¢ per fl oz — same product category, 4.3× the price per unit.
The 12-month picture
Jul 2026low 8.3¢ per fl oz · high 15¢ per fl ozSep 2026
Best-value price is down 27.6% since last month — a good month to stock up.
Lowest we've ever tracked: 8.3¢ per fl oz (September 2026).
How we figure this out
Once a month we pull live Protein Shake listings from Amazon, Walmart and eBay, read the honest quantity out of each one (fl ozs, in this case — the unit that actually matters), and divide the real price by it. Coupons that change what you'd pay today are applied; "subscribe & save" teasers are not. Then everything gets ranked by cost per fl oz, because a big box with a small number inside is still a small number.
Our Amazon links are plain links — no affiliate tag, no commission.
Amazon doesn't allow affiliate sites to run price alerts, so we chose the alerts. If eBay or Walmart links ever earn us a commission, they'll be labeled (paid link) — and it never changes the price you pay.
Prices checked September 1, 2026. Prices change fast — treat this page as a map, not gospel, and YMMV. For today's numbers, run a live search.