In Prestashop 184.108.40.206 the Price Slider does not work, so you're left with "range lists" which are not helpful.
To kind of control the limits on these "Range Lists" I tweaked the following file:
'.(int) Tools::ps_round($max_price[$currency['id_currency']] * (100 + $max_tax_rate) / 100, 0).')';
Changed to this:
'.(int) Tools::ps_round($max_price[$currency['id_currency']] * (2), 2).')';
This will basically double the top limit and give you less lines on your range (see image below). (My top range was half so I kind of had twice the lines).
I still do not like this "solution", but may be good enough until I have time to find a better one.