Make sure your coupon specifically says it's allowed for that kind of item ... the 20% and 25% off ones have limitations on what it can be applied to.
PSI has some decent looking dust collection solutions ... this one is their portable version.
https://www.pennstateind.com/store/DC660P.html
Collect dust from any machine anywhere with this economical, powerful and portable dust collector. Features include:
1-micron filter bag
10" impeller
1HP motor blower
660 CFM, 8.5" MAX S.P
4" inlet & outlet
110V, 8 Amps
cost is around 210 dollars ... (10% off, end of summer sale, but you might be willing to wait for another sale or discount to pop up), run up to 15 ft
The next step up is still portable, on caster wheels ..
https://www.pennstateind.com/store/DC2V3.html
New & improved model! Keep your shop clean and comfortable with the 1-Micron Dustroyer. This 1-1/2HP dust collector is suitable for any shop or large or small. It gives superior air flow and improved service for long runs of hose or duct systems. This unit generates 1250CFM and runs effortlessly on 110V - using much less power yet providing nearly the same performance as similar units with 2HP or more. Comes standard with high filtration 1-micron filter bags and band clamps ONLY SHIPS IN CONTINENTAL USA
cost on this unit is around 289 dollars run up to 25 ft
for 220v power in a still-portable style (but you can enclose it like the previous one),
https://www.pennstateind.com/store/DC2000B.html is available for 2HP power.
A 2HP Dust Collector with Quality, a Great Price and Exceptional Performance Originally $345, this 2HP collector is ideal for any shop, large or small with 220V electrical service available. It gives superior air flow and improved service for long runs of hose. The unit generates 1500 CFM and will keep your shop dust free. It's on casters to move from machine to machine or connect it to a critical machine for standalone collection. Features of this model include: "Y" inlet connects to 2 machines 12" impeller delivers 1500 CFM Quiet and powerful 2 HP 220V motor Max Static Pressure 9.5" 1-micron Vu-Thru Bags standard
price point for this model is 299 dollars, but it would need a 240 volt outlet.