I was looking at this site for other things and noticed they are selling pretty cheap DAC cables:
10G SFP+ to SFP+ Passive Direct Attach Copper Twinax Cable
25G SFP28 to SFP28 Passive Direct Attach Copper Twinax Cable
comparing to FS at 2m SFP+ 10G; FS = $14 and colorpowercables = 8.46
Free shipping if you order more than $79 as well. Shipping was pretty quick got tracking within 6 hours of ordering on the same day.
10G SFP+ to SFP+ Passive Direct Attach Copper Twinax Cable
25G SFP28 to SFP28 Passive Direct Attach Copper Twinax Cable
comparing to FS at 2m SFP+ 10G; FS = $14 and colorpowercables = 8.46
Free shipping if you order more than $79 as well. Shipping was pretty quick got tracking within 6 hours of ordering on the same day.