Instead of endless comment discussions, I decided to post an answer.
First of all, I totally agree with Jefromi. Nobody in the world knows how to produce durable non-stick pans (if we form our expectations of durability similar to expectations of regular pans, so several years or a few decades). If you invest into the most expensive non-stick pan in the world, it will still lose its non-stickiness after some time. The non-stick surface is like a bar of soap, it gets destroyed with use.
But this doesn't mean that buying the cheapest pans is the best decision, because the cheapest pans 1) have other flaws besides lack of durability, and 2) can wear out quicker.
What is the relation between pan quality and price? I took a look at test results from Stiftung Warentest, a very thorough consumer research organisation in Germany. It is independent of all manufacturers and has strict quality control of its measuring methods. I looked at results from three tests: a non-stick pan test from 2007, a "budget" non-stick pan test from 2004, and a PTFE- and ceramic pan test from 2011. (The tests are in German. To see a table with numeric results, click at the "Testergebnisse: Pfannen" tab in the left-side menu of each article. The first numeric column, Qualitaetsurteil, is a weighted score calculated from the numbers in the columns to the right. The numbers are in the German school grade system, 1.0 for best and 5.0 for worst. All brands are widely available in Germany and may not be available internationally. I didn't bother to account for inflation in the following conclusions.)
What the first test shows: There is not a strong correlation between price and quality within the mid-price segment. Most pans are in the 30-80 Euro range, and most of them get a grade between 2.0 and 3.0.
Strangely, the second test also has pans up to 119 Euro, despite its title promising budget pans. But it includes more cheap pans than the first test. Again, we see that there is not much correlation between price and grade. Also, not all pans have the same strengths: for example the Ikea pan has a great score at non-stickiness, but it is mediocre in frying result quality, and its handle gets too hot. The 119 Euro pan gets a rather bad grade, but the best four pans are expensive, in the 68-99 Euro range.
The third test is hard to interpret. They compared ceramic and PTFE in the same test and pronounced ceramic the clear winner. 2011, ceramic pans were way too new on the market, so they probably didn't know about their weakness: the ceramic fails after a few months of use, much more spectacular than PTFE, without a correlation to mechanical damage (unlike PTFE). So they used a testing procedure geared at mechanical damage to calculate the test score (they filled the pan with ball bearings and moved it, and also used sandpaper on it). On the main page of the article, as well as on the Amazon reivews of these pans, there are multiple people saying that the non-stick fails quite early.
Beside this methodological fault, we can see that there isn't all that much difference between the pans measured. The best gets a 2.0 and there is only one below 2.5.
An America's test kitchen test which Jefromi linked in the comments also evaluated pans. The results are behind a paywall, but the methodology is free to read. They say that they tested durability by repeatedly frying an egg, until the egg started sticking. Most of them failed after 30 to 40 eggs, a single one kept going after 76, but there were ones which failed almost immediately. Luckily, you don't have to throw out the pan the first time an egg sticks, but this confirms that, beside a few outliers, nonstick pans have a very similar lifetime.
My advice is to go to a physical store and buy a nice heavy-bottomed pan, without splurging on the most expensive ones. Choose one which feels heavy enough to give you a good heat distribution and has visibly good production quality. It will probably last a couple of years. The actual life can vary a lot depending on how frequently you fry and how good you are at controlling temperature and treating it gently (no dishwasher!). It is personal preference how much you are willing to spend for this kind of lifetime.