OK, it's an f4.7 so more prone to coma at the edges of the field of view. Some people hate that. When I stated, seeing anything was a bonus so I could live with this. And that is what you will have to live with with cheaper eyepieces. Your $50-90 limit is a challenge, probably impossible in new eyepieces (but the second-hand market can deliver as new for 70-80% of new price)
I forgot to ask if you need to wear glasses to observe? That influences the eye relief that an eyepiece needs to have. Too little eye relief (such as you get in, say, a 6mm plossl design) and you cannot get your eye close enough.
Here are some thoughts:-
Get a wide-angle, low magnification eyepiece. There is a generic 30mm, 2", 80 deg Apparent Field of View (AFOV) eyepiece available from many places. Andrews (
www.andrewscom.com.au ) sell this one:-
"ANDREWS 2" 80° 30mm ultra-wide apparent field eyepiece."
for $99 (that's gone up lately!) At f4.7, you will have some significant coma in the outer field, but it will be more enjoyable than your 26mm due to wider field.
Also get a 2x barlow lens. This one from Andrews is made by GSO and can be used with 2" and 1.25" eyepieces.
"ED 2x magnification, 2" (with 1.25" adaptor), FMC, 2 el., achromatic"
Andrews sell it for $79. This allows you to have less eyepieces but still have a range of magnifications that you can use. So you now have 30mm and the equivalent of 15mm.
Now, you need a higher magnification eyepiece, but with your barlow available, you don't have to go too low in focal length. Maybe a 12-15mm will be sufficient. If you could get a Vixen LV 12mm, that would be nice - but locally they sell for $199 new. On the second-hand market, you should be able to pick up one for $100 or less. These are nice glass and have good eye relief. Your view would be better than the 30mm from above in the barlow.
Alternatively, try a plossl design. Stick with your 10mm plossl for a while, by itself and in the barlow. (Probably in the barlow will be "pushing it" for most seeing conditions.) If you find you are OK with the AFOV (49-50deg in a plossl), maybe a better quality plossl is what you want. I see Bintel
https://www.bintelshop.com.au/welcome.htm
has Televue plossls reduced - 15mm and 11mm each for $115. Perhaps the 11mm used by itself and barlowed for the Moon, Jupiter and Saturn on nights of good seeing.
