Global KING K-45 Deluxe Water Whetstone 1000 Grit Stone Knife Sharpener Japan
https://www.ebay.com.au/itm/221251333791
Don't have one but should be much better than unbranded double side 1000/3000 ones.
Good for entry level.
My current 1000 one is SHAPTON.
Global 2 Stage Japanese Ceramic Minosharp Water Knife Sharpener Knives 79709
https://www.ebay.com.au/itm/324653362440
could be cheapest ever, this and the 3 stage one is the only roller sharpener I would recommend for Global, or even for Shun if you don't want to use Whetstone
Victorinox Fibrox Curved Narrow Butcher Boning 15cm Knife 5.6601.15 RED
https://www.ebay.com.au/itm/224010009315
This is enough for families, no need to spend $100 for Global and more expensive ones.
Been wanting one of these for a while. Easy purchase for under $20.