Sharp Prices via eBay offers the 60-watt Equivalent Dimmable A19 Light Bulb 8-Pack in Soft White for $17.99 with free shipping. At $2.25 per bulb, that's $22 off list and the lowest price we could find. These dimmable bulbs have a purported 25,000-hour lifespan.

Note: Home Depot offers a similar, non dimmable 8-pack for $15.76 with free shipping.