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Summary:
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The store offers very reasonable prices, probably an honest reseller, but there are obvious problems with 1) order status, 2) shipment tracking and 3) COMMUNICATION.
I would think hard before ordering again from them.

In addition to the website hosted on Yahoo Stores, the reseller has active eBay store (active) and Amazon front store (empty at the time of writing this review, but with some mixed reviews from customers).

Detailed purchase story:
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On July 7, I ordered a stethoscope from this reseller because of the promised 2-3 business day shipping via priority mail ($11.99). The store is hosted on Yahoo Stores and uses the checkout mechanism which also provides status information and tracking number.
Four (4) business days later, on July 12, I e-mailed the store, asking about the item and telling that the status is not updated and there is no tracking information. Quickly, I received a response "We have indicated on our home page that all orders will be fulfilled on the end of July."
I checked the store page, and nothing was indicated, and the item was still listed with "Availability: Usually ships the same business day". They asked "Please let us know if you can wait for it."
I responded that I cannot wait that long, as I needed it to arrive by the 16th, and it will be worthless after that, and requested an immediate refund.
To this day (July 26), I have not received any subsequent response, whatsoever. The status on the order status page has not been updated. (No refund either.)

The irony is that the item was delivered on July 12, but since I was informed it was not sent, I did not check with my receiving, and only learned about it the following week.
After all, I received it just before the deadline, but I had not time for testing if it is working or not.

It was a pure luck that I had not placed another order for the same item with a different reseller. Otherwise I would have paid twice for the same item, as I have no need for two of them.
So, for me this is an UNRELIABLE reseller.

The USPS tracking information shows that the item was shipped from Sun Valley, CA on July 10 (i.e. not on July 8 which would be the same business day). So, it seems to be drop-shipped.

While shopping around, I found that the reseller also sells the same item on E-bay, where, indeed, the availability is marked as of the end of July.

Additional information:
They are listed on dotmed.com as
Mr Augusto Lopes, Centaurus Medical
5600 81st Terrace North
Pinellas Park, FL 33781
USA
which is the same address as on their own (Yahoo Stores) website.
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