Cheapest priced copy (Urza's Saga): $2.79 at Card Kingdom, near mint, their price list as of .
Thran Turbine 
Artifact · Uncommon · Urza's Saga · #311
At the beginning of your upkeep, you may add {C}{C}. This mana can't be spent to cast spells.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Saga | 311 | Uncommon | $2.79 | — |
One ruling from Wizards of the Coast
- 25 January 2011Any of this mana that isn’t spent during your upkeep step will be removed before your draw step begins. You cannot save it to be spent on the card you will draw this turn.