Post your interesting eBay finds...

[Stoney3K]

Some brand new 12x12 optical breadboards, could be a good projector base, $400:

http://cgi.ebay.com/Optical-Honeycom...item414b8829b2

Seller has bigger sizes availalbe (up to 4' x 8', or 122x244cm)

[swamidog]

well, yes.. you could buy this plate off of ebay for 400$, or you could buy a brand new one from Thorlabs for 160$

http://www.thorlabs.us/thorProduct.cfm?partNumber=MB12

or you could hit the surplus laser dealers. the last 12x12 i bought was about 80$, but you should be able to find them for ~100$ without too much effort.

Some brand new 12x12 optical breadboards, could be a good projector base, $400:

http://cgi.ebay.com/Optical-Honeycom...item414b8829b2

Seller has bigger sizes availalbe (up to 4' x 8', or 122x244cm)

[bwang]

Some cute, small, and green photocoagulators:
http://cgi.ebay.com/Nidek-GYC-1500-5...#ht_500wt_1156
Some Googling says they are 1.5W lasers, probably DPSS.

[MarioMaster]

Looks like flashlamp to me, resonator is visible in the pics.

[bwang]

Looks like flashlamp to me, resonator is visible in the pics.

Darn The GYC-1000 is diode pumped, so for some reason I automatically assumed this was too.

[Laser Ben]

The resonators are pretty cool, but worthless, I just sold a new one for $100 on ebay. It has a Kigre head, a TEC cooled KTP and adjustable mirrors, but other than that, worthless, power supply may be fun though.

[Eidetic]

Here's a classic He-Ne that makes a great shelf display. The grey paint says late '60s but the connector says '70s to me. Check out the metal bellows! I have one and in a display case with the cover off and it really has an "old" look to it. Price seems reasonable for the rarity, and I'd be taking it if I didn't already have one. Laserman532 might have some original "S" badges to replace those missing on it (ever find them, Pat?).

http://cgi.ebay.com/Spectra-Physics-...5#ht_500wt_717

[Stoney3K]

Here's a classic He-Ne that makes a great shelf display. The grey paint says late '60s but the connector says '70s to me. Check out the metal bellows! I have one and in a display case with the cover off and it really has an "old" look to it. Price seems reasonable for the rarity, and I'd be taking it if I didn't already have one. Laserman532 might have some original "S" badges to replace those missing on it (ever find them, Pat?).

http://cgi.ebay.com/Spectra-Physics-...5#ht_500wt_717

Too far away for me, otherwise it would have been an early Christmas gift. That's one beauty of a tube.

I've always been charmed by the nice glasswork and craftsmanship in these SP heads.

[bwang]

If you want to build some giant laser of doom this rod is just what you need: http://cgi.ebay.com/LARGE-Laser-rod-...#ht_602wt_1141
Apparently they're surplus from the Shiva laser.

[LaNeK779]

i think this is so huge because it is built for flash lamp pumping and not for diode pumping

class IV for sure at this size, but diodes could do much better. anyway, not for the faint hearted this project is