Yes, Ikea has a large selection of leather sofas, armchairs and loveseats on sale. You can browse their site to find what you like. They are for sale, but not necessarily on sale. The prices however are still very affordable.
Leather sofas can be easily found at a local furniture store. For more inexpensive options check eBay and even Craigslist. Shipping costs makes shopping online unfavorable.
The Ikea store regularly has huge sales. One can easily find out the date of the next sale on the official Ikea website or on the official Ikea Facebook page.
If you are looking for a geniune leather sectional sofa expect to pay somewhere between $1,800 and $5,000 for your sofa. You might be able to find one slightly cheaper on sale. Bonded leather sectional sofas start in the range of $600.
You can look for cheap sofas thru discount or warehouse sites. Or you can check out your local resale shops, craigslist, or even local ebay. There are always Great deals to be had. This comes down to preference. Are you looking for New or (Gently) used.
Most sofas that are on sale have just as much quality as the next. When a sofa is marked down is does not mean it's not good. However, in some stores, The sofas are marked down because something has happened or the sofas just not popular. So keep that in mind.
Someone can purchase a leather arm chair at a furniture store like Ikea, Leon's, or The Brick. One can also purchase a leather arm chair at department stores like Sears. Flea markets may also offer a leather arm chair for sale.
July
According to IKEAFanscom where I always go for my ikea sale information (most accurate, plus real people including ikea employees give the details), the next sale is on now! Until November 11th. http://www.ikeafans.com/home/ikea-us-kitchen-sale-20-off-free-financing-for-24-months/ Get free financing too.
If you're looking for outdoor sofas, give www.maxfurniture.com a try. Their website claims to have a big sale on outdoor sofas. You could also try craigslist.com.
I noticed that www.gumtree.com has many sofas on sale. They offer a variety of styles and colors. This would be a good place to start. It's also great to check the flyers for your local furniture stores.
There are many places that have contemporary furniture for sale. Ikea, is a good example, but rather expensive... some of your ordinary places like american furniture have better priceing on equal products.
Ikea. That's where.