Philips Hue White and Color Ambiance A19 Single LED Bulb is on sale at Bed, Bath, Beyond for $24.99 + Tax. Available for Free Shipping over $39 or Free In-Store Pick-Up. Last comparable deal I saw on these was the Bestbuy one for 3 around $100. It may take a second or two for the sale price to load and change.
: Both now OOS for shipping, so store pick up only if available near you.
If you have a 20% off coupon for Bed, Bath, Beyond, you should be able to apply that too, dropping the price even lower (YMMV). You can get them pretty easy even just signing up for email. I have been buying all of my Hue lighting there and haven't had any issues with coupons in the past few months on the color hub, light strip, etc. I just bought the 4 bulb kit with hub again on here today. That's on sale too. So 4 bulbs with the Hub came to $85.29 with a 20% coupon I had, so that's about $21.32/ Bulb for me since I already had a HUB.
Hope that helps