Acquired from government surplus. As you know with most government agencies, when a new grant comes in,

they have to justify the grant by buying new equipment leaving very useful equipment for surplus.

INTERNATIONAL CUSTOMERS- NO MEANS TO TEST, and due to the cost to ship internationally and the distance items have to travel, ALL items shipped outside of the USA are SOLD AS IS WITH NO GUARANTEES. We love our international customers and would love to have your business but due to the nature of the used equipment , and that all items are untested and used, all sales are final. No refunds or returns, please bid accordingly!