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I have 70 or so CPUs to send to Boardsort. Instructions say to package them in individual clamshells, which is understandable, but costly at nearly a dollar per clamshell. I've sold bulk working CPUs to other buyers in the past and bubble wrap-- thee CPUs to a fold-- was more than adequate to protect the items. May I send CPUs to Boardsort using the wrapping technique?

How you send them is up to you. But clamshells are reliable.
I would suggest buying cpu trays for a few dollars each. 6-24 cpu slots per tray. That’s the safest route for sending bulk CPUs.

i have bought clamshells on ebay for .25-.30 cents apiece.

I will on occasion send a cpu to be tested to bolster the funds of an outgoing package, or if I don't feel like messing with ebay.
Get some ESD bags (usually free trash) stick the CPU's in there in a single layer, wrap that with bubble wrap (also free if you know where to look). Short answer: your method will be fine.
Really, anything better than tossing 70 cpus in a plastic bag and throwing that into a box.
Clamshells are great, but for a one way ticket (Boardsort won't be sending these back to you) it is overkill. And expensive.

I wrap mine up in tri-fold paper towels and tape the ends. I tape 5 of those together and pack them in a small box and haven't had a problem yet.

I buy the small 4x7 bubble envelopes at wally world and cut them in three then tape it shut. Having a 2+x4 bubble wrapper to put the cpu in. I mark the outside with the cpu # and then when I am ready to send them in I just have to go thru and fill out the list. I already have them packaged and I know what is inside.
Joe

Clamshells work for individual CPUs. They run around 10-15 cents each.
There five standard sizes.
Large pin (pentium era ceramics, black fibre, modern AMD)
Small pin (486 sizes)
Wide pin (pentium pro, opteron)
Large LGA (sun, HP)
Small LGA (core, I series)


Trays come in 4-20 cpu sockets. In even numbers.
Small, large, and wide
Crafty people can very carefully cut double-wall trays to single chip trays.
Trays start around a filler each though. And wequire packaging knowledge.
Don’t get caught up in “designed for xxx cpu”. No generic trays are designed for any specific processor.