Sophia Electric 12AT7 Tubes: Interchangeable with European ECC81
Pricing:
Grade A (top 10%) : $125 per unit with a 30-day warranty, $29.99 extra for one year warranty.
Grade B (top 25%) : $100 per unit with a 30-day warranty, $29.99 extra for one year warranty.
Grade C : $79.99 per unit with a 30-day warranty.