Top resale value speakers

When you consider buying a new pair of speakers, the sound, outlook and review of the speakers are important, but resale value of speaker is also a important thing to consider before your purchase. Some of the speakers resell value drop so deeply, but some don't. Can you suggest some high resale value speaker company? As far as I know, B&W have a pretty strong resale value compare with their brand, such as Dynaudio, Proac or JMLabs.