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Martek lab and coins

Martek lab and coins

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Callinectes Coins

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Callinectes Coins

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About us

MI is here to provide low cost stable isotope reagents to the research community. We specialize in compounds labeled with Carbon 13, Nitrogen 15, and Deuterium.....

We also sell surplus lab reagents for ourselves and other small companies in order to generate revenue to enhance our production capabilities

If you are in the Baltimore Washington area and have some lab items to sell send me an email I can help!

Occasionally we have some fun non science items for sale as well! This includes the vast coin collection I am working through so check it out!
Location: United StatesMember since: 31 May, 2004Seller: callinectes1

Feedback ratings

Last 12 months

Positive1,151- positive Feedback in last 12 months
Neutral4- neutral Feedback in last 12 months
Negative1- negative Feedback in last 12 months

Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable postage cost
4.9
Delivery time
5.0
Communication
5.0

Seller Feedback (19,470)

  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    I purchased 2 Hallmark SW Ornaments (stormtrooper & Darth Vader TIE fighter). The items condition were as described. The box on the DV TIE was a little rougher than I remember from pics but not bad for it's age. Shipping costs were ok & shipping time was fine. Packaging was good and protected items. Value was excellent for what I got. the DV TIE lit up as advertised. Seller let it be known up front there would be a delay in shipping as they were away. Appreciated that. Good experience.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    This 1944 uncirculated Great Britain silver sixpence coin is perfect for my collection of exquisite coins. It is as described and beyond. It is a great value for the uncirculated Mint condition. The packaging is just right sealed nicely in a heavy duty envelope. The shipping was very fast. Outstanding seller experience. Will buy from again. 5 stars plus.
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Top tier seller! Hits all the targets for a great eBay experience: Lighting fast shipping, secure packaging and inexpensive shipping, accurately represented photos with true description, and exceptional value!
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Coin as Described. Great Value. Packaged Well. Low Cost Shipping and Fast Service. Good Communication. A++ eBay Seller!
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Shipped in the condition as described, good value, packaged well and speedy processing. I recommend this seller!
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Well, I am not sure about the "brilliant uncirculated" part of the description, as the coin is covered with corrosion, but the coin is in fact uncirculated, and was priced right and shipped promptly. To be fair, it was obvious from the photo in the listing that "brilliant" was not the description that most folks would apply.
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