I got mine when they were having deals. I paid about 99 cents per 60-watt equivs, and $1.50 per 75/100 watt equivs. Then every once in awhile Home D would have a box of 6 on sale for $8 and I’d pick up a box or two. I have a bunch just waiting to be used. But you’re right, it only makes sense to get them when there is a special deal.
Mine were a lot more expensive.