#1.The Sherlock Manning will be made by the original company and will be better built than most of the later models from that company.
#2. The Henry Herbert looks to be from the 50’s and would be the best buy for you.
#3. The J. Spencer is an English cottage upright, which will not serve your needs for learning to play.
#4. This instrument will have strong sound with good tone. From the later 20’s or early 30’s Heintzman & Co was the Roll- Royce of the Canadian piano industry.
In reality it is a toss-up between #2 and #4. With #2 you get a more modern piano in a smaller box; easy to move and to place in a room but smaller sound with less tonal qualities. A brand name Canadian built piano.
With #4 you get a quality build with another name brand piano; older and possibly in need of some repair, the Heintzman will have strong sound, with good tone because of the old Weikert felt hammers, hopefully the bass string set has been changed from the original iron bass.
Of course with any purchase of a second hand instrument always have a good technician check out the piano for present mechanical condition and then local market value.
Two technicians for you to choose from;
John Ross here;
Ross, John M. RR #2, Windsor, NS B0N 2T0 Tel. (902) 798-8508 or Toll free: 1-877-577-4266. E-mail:jrpiano@win.eastlink.ca
Wayne Walker here;
Walker's Piano Services
4729 Hwy 1 RR2
Windsor, NS, B0N 2T0
902-221-1540
https://walkerpiano.ca/