These Scopes/Lasers are not for you!
you can not give a proper pricecheck on them based on your style... you can say what they might be worth to you, which is nothing really... but that is not an accurate way to assess their value!
I do not mine, and I know virtually nothing of mining strategy or mining equipment value... so it would be like me trying to place a pricetag on a UL lvl 7 amp! I can't just say "it's not worth much, cuz I don't mine!"... you see?

you are wrong in assuming people in the market for these Scopes/Lasers spend 200 ped ammo as 1 run, and in comparing the 1-time use Boosters with half hour duration to an infinitely reusable item that can be resold!
Anything that does not pay off in 2-3 years does not make sense to acquire, especially when exist the risk of impairment items several times. That is my strategy, and I think it can work for everyone. But I have in my inventory Improved Excavator, when I doing a big mining jobs, I used it for considerable economy.
With respect to the price of 7 UL amplifier, since you want to hear it, you get:
Now the MU on Level 7 amplifier is 5.83%
TT is 120 PED.
This means that the miner pays for each L amplifier extra 7 PED. One amplifier allows you to make 13 triple drops on the planet Arkadia, and thus can be decayed in ~3 minutes. If we assume the minig session in 4 hours a day (lets 1 hour of 4 we digging what we found), it turns out that we spent 60 amps in 3 hours, and it will be 7 x 60 = 420 ped of paid MU per day. Thus, if we count MU for one year, with UL 7 amp will be saved 153,000 per year. So MU in 200,000 PED will be returned by a little more than in a year. But bear in mind that you must do a turnover ~ 10000-12000 PED
in a day (depending on your finder), and then be able to sell all found ores/enmatters/treasures. If you make less turnover - return will spread over years or even decades.
You can return these MU's only with giant turnovers. This will be not a game, but work or business, which means that it can not be seen from the perspective of the average player. You cannot expect, that average player will buy these UL amps. The same with the sights.
99% of players do not need it (or need cheap). But whether wants to buy the one who needs it - a good question. This player is also can count their money and think about risks of purchase.
Edit: You are also average player and cannot return back this 15K, paid for sight.
Edit 2: And more. Those players in the game, which to hunt with giant amounts of money, are not so much. This means that when 20-30 people buy these sights, they will need only to those who are willing to pay less. So the following prizes will be sold cheaper, next one more cheaper, and how much more of them will be in the game, they will cost cheaper and cheaper, and cheaper. And the final price may be not 80% of the initial value, but 10 or 20.
Edit 3: Simply, many players are trying to equalize MU of the item by the upper possible value, without taking into account important things as deflating prices and the ability to recoup the costs in reasonable period. And you, without being able to recoup the costs of this sight, but protect the high prices. Do you know why? Because when you get something like this, you too will be able to sell it expensive, based on previous experience and correlation with this sight price.
With this whole wall of text I have not tried to devalue this sight, I just smash any arguments about the need to purchase it.