Buy or sell surplus industrial control and measurement equipment, hardware or software, especially anything relating to HART or fieldbus. No charge to put your advertisement here - "for sale" or "wanted". Just a 10% commission on the eventual deal (to be paid by the advertiser).
E-mail me full details of what you have, or want, at firstname.lastname@example.org. (Your personal details will not be published, but may be given to responding enquirers.)