Selling cpu without box

[Matteol]

I'm going to sell my cpu on ebay, but I don't have the box it came in. What would your suggestion be on packing it and in case this is relevant it is an I5 6600k.
Thanks in advance

 

[nzalog]

Put it into a small static bag, cover with a couple layers of bubble wrap. Use small USPS flat rate box (box is free and includes priority postage).

Should not cost much more than 5-6$ plus whatever insurance you may or may not choose to use.

 

[MaDDD]

If you have an anti-static bag (Usually you'd get one with a motherboard and GPUs) then you could use one of those and it should be relatively safe. A cheap CPU I bought a while back came simply wrapped in cardboard and it did the job too.