Is it worth it to buy used camshaft for my 89 300 TE

[dka-66]

I have a 1989 300 TE that blew a head gasket, I figured what the heck I'll have the machine shop check it out to make sure everything is up to par and to do a valve job, guides, and seals. Well, I just got the call back from the shop and if turns out it needs a new cam and one lifter is bad.

I would like to know if it is worth it to buy a used camshaft and lifters

there is one on ebay http://cgi.ebay.com/ebaymotors/Mercedes-190e-300e-Camshaft-m103-engine-w201-w124-w126_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQitemZ120286533168QQptZMotorsQ5fCarQ5fTruckQ5fPar tsQ5fAccessories

and a few others I have found while searching used cars parts sites.

Or do I need to suck it up and and buy new?