[tesla_hv]

I have six.

[skotrat]

hmmm

I probably have 5 or 6 but most are gathering dust

[tubercle]

2 five gallon glass

2 six gallon Better Bottles

[jds]

I have one 6.5 gallon glass carboy, four 5 gallon glass carboys, and a Pyrex 2-1/2 gallon carboy that was given me by a lab.

[beerocd]

(13) new 6.5 gal Italian glass with threaded tops with the caps. (2) six gallon mexican glass. (1) 5 gal.

Craigslist

-OCD

[crabber]

I have six 6.5 gallon and 6 5 gallon.  I don't use the 5 gallon ones anymore for the most part.

[dbeechum]

Hmm...

2 10 gallon corny kegs
4 6/6.5 gallon carboys
4 5 gallon carboys (only used for long, long aged projects - e.g. sours/meads)

[alewife]

I have 8 carboys-- all 3 gallon Better Bottles.  I brew half recipes, can't lift a full glass 5 gallon carboy, and I like a variety of beer around.

Alewife

[pdbreen]

4 - 6gal Better Bottles (so far, really liking these)
2 - 6gal glass
4 - 5gal glass

By the end of the day, I hope to have something fermenting in all but 1 of them.

[bluesman]

2 - 6 gal
3 - 5 gal
1 - 3 gal
1 - 6 gal Better Bottle
1 - 3 gal Better Bottle

[hopfenundmalz]

3 6.5 gallon ones for primary fermentation when the conical is tied up.
3 6 gallon ones for dry hopping with irrational exuberance.
8 5 gallon carboys for 'normal' dry hopping, aging, ciders and meads.
2 2.5 gallon ones for cider and mead.

I know people with more than that. 

[dimik]

I only got one 5-gallon and one 6-gallon 

[BrewingRover]

1 six gallon, 2 five gallon and 2 three gallon. And a bunch of buckets, too.

[dbeechum]

I only got one 5-gallon and one 6-gallon 

It'll probably get worse.

[barliman]

Just two.  But that's enough for me.