I'd consider them "older" after about 10-12. Average captive lifespan I believe runs about 12-16, depending on conditions, and the record I think is approaching 20 or more. Someone please correct me if I'm off.
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1.0 Hypo stripe, Het RW from JL (BJ)
1.0 HypoTang from Crested (Apricot)
1.0 Tremper Albino from Petsmart (Cloud)
1.0 SHCT hatched by me! (Sunny)
0.1 Hi-Yellow Leopard gecko from Petco (Beatrice)
0.1 Stripe female (rehabilitated rescue)(Pepper)
0.1 Jungle het RW hatched by me! (Jungle Bunny)
0.1 Normal from 2001 (Freckles)
0.1 SHCT Leopard Gecko from Petco (Brite)
0.1 Tangy Mutt Leopard Gecko from Petco (Rainbow)
0.1 Stripe poss. het RW hatched by me! (unnamed yet)
0.1 RW Stripe hatched by me! (unnamed yet)
RIP Peaches, Ghost, Bill
Adopted out: Goldie, Leucy, "Q"
Hatched: ~50