The only price differences between comparable bags (same size, calfskin, same style), is in the hardware. Gold hardware is more expensive than silver- about $150 to $200 usd. Seasonal colors do not affect price.
I hope this helps.
Oic, ive only seen black with gold hardware but didnt ask the price. The rest of the colours are all palladium hardware. The leather looks the same to me but dont know why the petale blush color is priced higher than the classic grey...