Old British coins are they in demand in the USA

[Tommo]

Hi everyone
Are British coins ( old 1d - penny, half penny 1/2d & threepence pieces 3d ) sort after in the USA or are they easily available.
Is it worth bringing any over from the UK when we visit Florida in September, do they fetch a good price,
I have an abundance of these coins in mint condition, looking for an honest opinion or is it best just to sell through auction sites here in the UK
Thank you in advance
Kevin