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Martek lab and coins

The seller is away until Thu, Aug 21, 2025. Expect a delay in delivery until they return.

Martek lab and coins

54K items sold
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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: May 31, 2004Seller: callinectes1
Top Rated SellerMartek lab and coins is one of eBay's most reputable sellers. Consistently delivers outstanding customer service Learn more

Feedback ratings

Last 12 months

Positive1,282- positive feedback in last 12 months
Neutral6- 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 shipping cost
4.9
Shipping speed
5.0
Communication
5.0

Seller feedback (19,253)

  • *****- Feedback left by buyer.
    Past month
    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 6 months
    Verified purchase
    Good Seller. FAST shipping, packaged well. Good Value. Good Communications.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Quick reply to any communications, well packaged for delivery, item in very good condition and was as described, fast shipping and a very reasonable price for this item, will not hesitate to purchase from again, THANKS!
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    A+ seller! Shipped fast, well packaged, and arrived as described. An excellent eBay transaction! Thank you!
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Prompt delivery. The coin was well packaged and protected while in transit. The coin's quality was exactly as described. Thank you for the fantastic price. I am very pleased with this purchase and I Highly recommend this seller.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Unopened in original mint package as advertised fast shipping good price
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Use this space to tell other eBay members about yourself and what you’re passionate about. Give people more reasons to follow you!567/1000