I would look at GOOD 450w models if the GTX 1050 ti or an equivalent is the biggest card that it's going to ever run. If you think you might install an even higher tiered, more capable card at some point down the road, then it probably makes a lot of sense to just get a good 550w unit from the start so it doesn't have to be replaced in six months or a year when you replace the graphics card with a newer, more powerful model.
When it comes to power supplies, the model is the important factor. Watts don't mean anything if the unit is a POS, and there are PLENTY OF POS units sold by companies that are well thought of like EVGA, Thermaltake, Cooler Master, Antec, Rosewill and other big names. Even Corsair has some real turds. In fact, most of the well known brands have BOTH good and poor quality models.
Also, right now is a VERY BAD time to try and buy a motherboard, graphics card or power supply because most US, UK, Canadian, Australian and EU retailers have not seen much if anything in the way of replenishment of inventory over the last two months or so, so people stuck at home have mostly ran them out of hardware building or upgrading systems while locked down with Coronavirus restrictions, and no new hardware coming in from China which is where the majority of electronics and mostly all computer hardware aside from monitor panels, memory and CPUs comes from.
So it might be tough finding a decent unit and certainly unlikely to find one at a reasonable price, right now. I think we might start seeing inventory getting replenished somewhat starting in the next week to two weeks.
Until then, this might help with making a decision on what power supply to go with.
Below you will find MY standard list of recommended power supplies and beyond that this thread is intended as a landing place for questions or discussions regarding specific units, platforms or related PSU tech, all of which are all welcome to be discussed here. If it's related to power supplies...
forums.tomshardware.com