You do need to be careful with recent releases when it comes to insurance value especially items that have been readily available. You may do better to give your insurance value a collection total if most of the items you are listing are recent.
Apple Bloom 2011 - £3
Applejack 2010 (forelock) - £5
Blossomforth V1 - £20
Buttonbelle - £3-5
Cheerilee 2011 - £3
Cherry Berry - £4-5
Cherry Pie - £6
DJ Pon-3 - £5-6
Daisy Dreams V2 - £5
Dewdrop Dazzle V1 - £7
Diamond Dazzle Tiara - £10-12
Diamond Mint - £5
Diamond Rose - £16