Those prices are for ABEC Precision Class 3. You don't need precision class 3 bearings for these lathes. ABEC Standard are of sufficient quality and precision to meet the precision capabilities of these lathes.
Correct Replacements:
Timken numbers
14276b (Cup) $ 59.95
14125A (Cone) $ 12.82
16284B (Cup) $154.67
16150 (Cone) $ 36.25
Prices quoted on Amazon.com less than 10 minutes ago as of this writing. Lower prices may be available, you have to do some digging to find them.
Those cups have a stepped rim and are not demanded in large volume, hence the high prices for the cups.
Spiral_Chips