I think that's a really good price. I'm a big Byron fan and still have most of their sales stuff. These are the next to last factroy prices - I know this stuff was more when Byron went under (keep in mind this is going back a few years)

FACTORY PRICES
last time Byron offered OS77 Byrojet packages $334.50 each
F-15 kit $899.00
Main retracts $289.85
straight tread tires $27.30
Nose retract $120.85
Speed Brake kit $120.85
Pneumatic support equip $41.20
Gear brakes $84.85

You do the math!

AH....... I miss the good old days when this stuff was actually affordable!!