Since I’m a bit short of breath lying down, I thought I could get a oxygen saturation sensor to see if there’s enough oxygen in my blood. I know they make portable ones since my primary doctor uses one when I go to her office. The first place I looked is Amazon and I checked price history on camelcamelcamel.com. This is another item that seems to have a thousand cheap Chinese copies but none of them are cheap anymore. Looking at price history of several items, they all seem to have doubled or tripled very recently. Several had their prices spike within the last day. How is that possible? Is it a bug/feature of the Amazon pricing model?
The price on this item (rated 4.5 with 121 ratings) was $14 until yesterday?! What’s up with that? I can tell these are all probably shipped from China by searching AliExpress which is like Amazon for 3rd party sellers in China. Here prices are still in the $15 range but will take a month to ship. Looking at the shipping dates on Amazon, it appears that items are shipping from China anyway so why not just order directly?
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I just purchased two sensors from AliExpress. This one has almost 14k orders and I chose the OLED + case version for $19.32. There are also coupons plus I paid with PayPal, which has fees and discounts too. It’s a bit confusing but the total came out to $36.11 for both. Delivery date is tentatively May 1st, which is comparable to some of the dates I see on Amazon. It’s my first order on AliExpress so let’s see how well this works.
Heh, I got an email from PayPal saying I spent $36.11, which is what I saw on the screen. However, on AliExpress, the order summary says order amount is $41.11 (not including $2 new user coupon and $3 PayPal discount?). If I ask them to generate an invoice, it says the total is $39.72. I wonder how much I paid for these oxygen sensors really.
Life with chronic diseases 