I just ordered an Avanti micrometer diopter sight from Daisy. Daisy's normal price for the item is $35. Other online retailers (Pyramyd, etc.) sell the exact same item for $60. For reference, the sight I'm talking about is Daisy part # DY5996, and can been seen at Pyramyd here:
http://www.pyramydair.com/s/a/Daisy_Avanti_Precision_Rear_Diopter_Sight/1212The diopter sight attaches to a standard scope rail so it would have use on many other airgun models besides the Daisy's.
It's not just Pyramyd that sells the sight for $60. That was the price I found at several online retailers, nobody had lower prices. I was quite surprised to find it direct from Daisy at a much lower cost. Daisy's S&H charge seemed reasonable too ... $8. Included in that $8 shipping charge were a few additional parts from Daisy - a new globe front sight and barrel weight ($10), a match sling ($11), and a sling mounting swivel ($2). I am buying these parts to upgrade a Daisy 953 rifle. Pyramyd had the best price on that 953 rifle (minus the accessories) - $65 for the rifle after applying a 10% off coupon. Plus about $10 S&H.