| Oasis | Definitely maybe | Creation | 5.00 |
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| Oasis | Standing on the shoulder of giants | Big Brother | 6.99 |
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| Ocean Colour Scene | North Atlantic drift | Sanctuary | Mint | 6.49 |
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| Oleander | Joyride | Sanctuary | Mint | 4.99 |
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| Oleta Adams | The very best of | Mercury | VG+ | 4.99 |
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| Olive | Extra virgin | RCA | Mint | 5.49 |
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| Olivia Newton-John | Soul kiss | Mercury | VG+ | 7.99 |
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| Ordinary Boys | Brassbound (Ltd edition with DVD) | B Unique | Mint | 4.99 |
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| Ozzy Osbourne | Just say Ozzy | Epic | Mint | 4.30 |