Cheapest priced copy (New Phyrexia): $0.35 at Card Kingdom, near mint, their price list as of .
Pestilent Souleater 
Artifact Creature — Phyrexian Insect · 3/3 · Common · New Phyrexia · #149
{B/P}: This creature gains infect until end of turn. ({B/P} can be paid with either {B} or 2 life. A creature with infect deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Phyrexia | 149 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 June 2011Multiple instances of infect are redundant.