The mini GNC booth at Sirena has it, but it's over priced.
I buy my monthly supply of a Glucosamine/Condointin/MSM compound on e-bay for USD 9.99 (including shipping to MIA) plus USD 3.00 per Lbs. shipping down here, which cover about three one month supplies... so, it comes to 10.99 (RD$ 390.oo) a month.
I grow fingernails like a tiger, my tendons don't hurt anymore, even when abused by excercise and my knees have gone silent.
... J-D.