This would, of course, depend on what the "expert" has for qualifications and what they have to offer.

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Roy D. Browning \r\nCoastal Instruments (Dandong) Co., Ltd.\r\nNo.7 Industrial Compound, \r\nTongxing Zhen'an District, \r\nDandong, Liaoning, P.R. China 118011 \r\nPhone: 086+415-613-2608 Fax: 086+415-613-2798 \r\nChina Mobile: 086+130-5033-6757