I've got a 2004 Honda Accord Euro, My air conditioner compressor has giving up and from what I've been told, the compressor clutch has came apart.

The compressor is typically very expensive to buy from a Honda Service centre, therefor I've been looking at alternatives on Ebay and such.

Is there any variances that i should be aware of, from buying it off an online supplier?

Do i need additional things such as an accumulator, oil, o-rings kit?

Thanks.