The auction of a particular number plate is likely to generate the most interest among Essex drivers.
Registration number ESS 3X, with a reserve price of £900, is going under the hammer along with 1,500 other special plates at Whittlebury Hall, near Towcester in Northamptonshire, on Wednesday.
The auction is being organised by DVLA (Driver and Vehicle Licensing Agency) Personalised Registrations.
The organisation's marketing manager, Damian Lawson, said: "A lot of people are naturally very proud of their local roots.
"There can't be many regions in the UK which lend themselves to a personalised plate quite like Essex and fortunately ESS 3X is ideal."
B007 HAM, EL10 OTT, H15 DOG, N47 URE, SO10 MON and 0007 BND are some of the other interesting number plates going on sale at the event.
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